Download ADDER ALIF 2112T User guide

AdderLink Infinity 2112T
User Guide
Experts in
Connectivity
Solutions
KVM Extension
Solutions
Configuration
System and Teaming ports: Initial configuration............................................16
Manual factory reset.....................................................................................16
AdderLink Infinity browser-based configuration utility........................17
A rough guide to configuring TX and RX units......................................18
TX (transmitter) unit configuration....................................................18
RX (receiver) unit configuration..........................................................19
Performing an upgrade.......................................................................................21
Options switches.................................................................................................21
Getting assistance...............................................................................................24
Appendix A - Transmitter (TX) unit configuration pages...........................25
Appendix B - The VNC port: Initial configuration........................................32
Appendix C - Tips for success when networking ALIF units.....................40
Appendix D - Troubleshooting.........................................................................42
Appendix E - Glossary.......................................................................................44
Appendix F - Configuration menus (via VNC).............................................47
Appendix G - VNC viewer connection options...........................................59
Appendix H - VNC viewer window options.................................................62
Appendix I - Java viewer options.....................................................................63
Appendix J - The KVMADMIN utility.............................................................64
Appendix K - Known working video modes................................................65
Appendix L - Hotkey sequences......................................................................66
Appendix M - Cable pinouts, video modes and general specifications...67
Appendix N - Fiber modules and cables........................................................68
Warranty...............................................................................................................69
Safety information...............................................................................................69
Radio frequency energy.....................................................................................70
CONFIGURATION
Mounting.................................................................................................................8
Connections...........................................................................................................9
VNC network link.........................................................................................10
Video link........................................................................................................11
Audio links......................................................................................................12
USB link...........................................................................................................12
AUX port........................................................................................................13
Power in..........................................................................................................13
High speed links.............................................................................................14
Further information
OPERATION
Installation
Front panel indicators........................................................................................22
Using the VNC viewer.......................................................................................23
FURTHER
INFORMATION
Welcome.................................................................................................................2
ALIF features..........................................................................................................3
AdderLink dual 2112T unit features.................................................................5
Supplied items........................................................................................................6
Optional extras......................................................................................................7
Operation
Index
INDEX
Introduction
INSTALLATION
Contents
1
One-to-many configuration
Using multicast techniques, an unlimited number
of receivers* can receive video and audio data
streams from a single TX unit.
* A maximum of thirteen concurrent USB inputs (via
multiple RX units) are permitted to a single TX unit.
Mixing ALIF and ALIF dual units
ALIF 2112T transmitters are complimentary to the standard AdderLink Infinity (1000
series) models which do not support dual DVI channels or fiber optic linking. It is
possible to mix ALIF, ALIF dual and ALIF 2112T units on a network. However, whenever
the two types are cross connected, the extra abilities of the ALIF dual/ALIF 2112T units
will be temporarily disabled.
CONFIGURATION
One-to-one configuration
The simplest configuration links one RX unit to a single TX unit, either by a direct link or over much
greater distances via a high speed network. In both cases, Gigabit cable linking and/or fiber can be used.
When both are deployed, connection speeds of up to 2 Gigabits are possible.
OPERATION
Thank you for choosing the AdderLink Infinity dual 2112T transmitter, otherwise
known as ALIF 2112T. ALIF 2112T represents a major advance in the capabilities of
digital extenders and switches. By encoding high quality DVI video, digital audio and USB
connections into Internet Protocol (IP) messages, ALIF dual offers very flexible signal
switching and distribution capabilities.
Adder’s extensive knowledge of interfacing techniques and high speed networking
has allowed us to develop new ways to break the chains of local DVI, USB and audio
connections. With ALIF dual, distance is finally no barrier to high specification, high
performance computing. Furthermore, since all signals are now IP, the most elaborate and
yet simple-to-use switching and multicast techniques make possible a great variety of uses.
In concert with a suitable ALIF receiver unit, the ALIF 2112T transmitter supports either
two single link DVI video streams or one dual link (very high resolution) DVI video
stream. This is in addition to a microphone, speakers and multiple USB peripherals. The
distance between them is limited only by the size of your network.
ALIF 2112T provides a choice of link connections. Each unit supports both copper-based
Gigabit Ethernet cabling as well as Fiber Channel over Ethernet (FCoE). These can be
used in parallel to provide up to 2 Gigabit connection speeds with the added benefit of
link redundancy that can maintain operation in the event of a failed connection.
Additionally, the ALIF 2112T has an in-built VNC server which allows it to stream lowbandwidth versions of its high-resolution output (via a dedicated Ethernet port on the front
panel) so that it may be accessed remotely, via a VNC viewer, through any standard network.
Low bandwidth VNC connection
Up to sixteen remote users can log in via standard
networks to view the output from the ALIF 2112T.
FURTHER
INFORMATION
WELCOME
INSTALLATION
Introduction
ALIF and A.I.M.
Where multiple ALIF units are used on a
network, we have developed the AdderLink
Infinity Management (A.I.M.) server to allow
comprehensive and secure central control of all
transmitters, receivers and users.
When using an A.I.M. server to configure ALIF units, it is vital that all ALIF units that you
wish to locate and control are set to their factory default settings. Otherwise they will not
be located by the A.I.M. server. If necessary, perform a factory reset on each ALIF unit.
MANAGEMENT SERVER
ADM
USR
UNC
ETH1
ETH2
PWR
ADM
USR
UNC
ETH1
ETH2
PWR
INDEX
AdderLink
www.adder.com
Please also see Appendix C - Tips for success when networking ALIF units
2
ALIF FEATURES
New feature: AFZ+ codec
AFZ+ compliments the existing AFZ codec by providing greater compression for
increased speed where pixel perfect results are not the primary focus. The transmitter
video configuration page allows you to choose the required compression mode. Choices
are:
• ‘Pixel perfect’ - only uses pixel perfect AFZ,
• ‘Adaptive’ - guarantees frame rate, builds to pixel perfect,
• ‘AFZ only (pixel perfect),
• ‘Smoothest video’ - forces the maximum compression, or
• ‘AFZ+ Minimum compression’,
• ‘Advanced’ - allows you to choose the mode:
• ‘AFZ+ Middle compression’, or
• ‘AFZ+ Maximum compression’.
ALIF units support the industry standard Transport Layer Security (TLS) protocol. This
offers protection against eavesdropping and tampering by third parties when data are
transferred between ALIF transmitters and receivers across networks (and also between
ALIF units and AIM servers).
INSTALLATION
Transport Layer Security (TLS)
CONFIGURATION
The AFZ compression scheme is primarily focused on improving the performance for
“natural” images (i.e. photographs and movies) and is automatically selected whenever
there is a benefit to do so. The AFZ codec is lossless and is very low latency (a small
fraction of a frame delay). It generally achieves 50% improvement (in compression) over
the RLE scheme for any areas of the screen that consist of images, gradients, shadows
etc., elements commonly found in modern desktop environments.
To maintain compatibility with non AFZ -enabled transmitters and receivers there is an
automatic switching method which will revert back to RLE compression when an ALIF
(1000) receiver is connected.
OPERATION
AFZ lossless codec
INDEX
The Magic Eye feature increases performance and reduces network traffic when ALIF
units are used with Apple Macs and other host computers that have dithered video
output. It also improves performance if the video source is noisy (e.g. from a VGA-to-DVI
converter).
Dithering is a technique used by some graphics cards to improve perceived image quality
by continuously varying the color of each pixel slightly. This gives the illusion of more
shades of color than the display can really reproduce, and smooths the appearance of
gradually shaded areas in images. Unfortunately dithering is an issue for KVM extenders
such as ALIF because it makes the image appear to be changing all the time even when
it is static, thus creating much more network data than can be carried by a Gigabit
Ethernet. The result is a reduction in video frame rate, which the user sees as slow
mouse response.
Magic Eye works by ignoring small variations in the video from frame to frame. It is
enabled by default as it is not obvious to the user that his poor mouse behaviour is
caused by dithering. In most cases Magic Eye is invisible, but it can produce slight color
inaccuracies on the monitor. For full color accuracy, Magic Eye can be disabled for video
sources which are not dithered or noisy.
FURTHER
INFORMATION
Magic Eye (anti-dither support added)
3
CONFIGURATION
OPERATION
...and also in multicast installations:
FURTHER
INFORMATION
Teaming offers immediate speed improvements in a one-to-one arrangement...
INDEX
The System and Teaming ports of ALIF units can be used in parallel to produce two
important benefits:
• Improved connection speeds up to 2 Gigabits per second, and
• Important link redundancy that can maintain operation in the event of a failed
connection.
INSTALLATION
Teaming operation
4
ADDERLINK DUAL 2112T UNIT FEATURES
The ALIF 2112T units are housed within durable, metallic enclosures with most connectors situated at the rear panel
- the Ethernet ports are situated on the front panels. The smart front faces also feature the operation indicators.
Front
INSTALLATION
Rear
INDOOR
USE ONLY
DVI-D-1
OPTIONS
DVI-D-2
AUX
1 2
VNC
port
Teaming
port
Indicators
System
(Gigabit
Ethernet)
port
These six indicators clearly show the key aspects of operation:
• VNC On when a valid network is present on either the teaming or system port. Flashes to indicate that a VNC connection is present.
• SER On when the AUX (serial) port is enabled and active.
• AUD On when audio is enabled and active.
• USB On when USB is enabled and active.
• DVI 2.5A
IN
1 2
Power
input
Options
switches
(further details)
OUT
COMPUTER
USB
port
Primary
video
input
Secondary
video
input
Audio
line
in/out
AUX
(serial)
port
OPERATION
5V
CONFIGURATION
ON
On when either or both DVI Video channels are enabled.
INDEX
FURTHER
INFORMATION
• PWR Power indicator.
5
SUPPLIED ITEMS
INSTALLATION
Power adapter
(20W) and
country-specific
power cord
Combined DVI-D and USB
cable (1.8m)
CONFIGURATION
Single link DVI-D to DVI-D video cable
OPERATION
ALIF 2112T transmitter unit
Serial null modem cable 2m
FURTHER
INFORMATION
Four self-adhesive rubber feet
Quick start guide
Safety document
INDEX
Information wallet
containing:
2 x Audio cable 2m
(3.5mm stereo jacks)
6
Single mode fiber SFP module
Part number: SFP-SM-LC
Please refer to the table in Appendix M for
information about fiber modules and cables.
Single link DVI-D to DVI-D video cable
Part number:VSCD1
Combined dual link DVI-D and USB (USB type A to B) cable
Part numbers: VSCD3 (1.8m length)
VSCD4 (5m length)
OPERATION
Multi mode fiber SFP module
Part number: SFP-MM-LC
Active copper SFP module
Part number: SFP-CATX-RJ45
USB cable 2m (type A to B)
Part number:VSC24
FURTHER
INFORMATION
Power adapter (20W) and
country-specific power lead
Part number: PSU-IEC-5VDC-4AMP
Audio cable 2m
(3.5mm stereo jacks)
Part number: VSC22
Serial null modem cable 2m
Part number: CAB-9F/9F-NULL-MODEM
INDEX
Two 19” rack-mount brackets and four screws
Part numbers:
One unit per 1U rack slot: RMK4S
Two units per 1U rack slot: RMK4D
CONFIGURATION
INSTALLATION
OPTIONAL EXTRAS
7
Installation
MOUNTING
INSTALLATION
There are two main mounting methods for transmitter and receiver units:
• The supplied four self-adhesive rubber feet
• Optional rack brackets
Connections
OP
TIO
1
5V
NS
LIN
E
MI IN/
CI
N LI
NDEV
IO
-DU
T
2
2.5
SAE 1 2
RC
ON
SO
LE
FURTHER
INFORMATION
IN
US DOO
EO R
NL
Y
AU
X
US
ER
LIN
E
MI IN/
CI
N LI
N
EO
CO
INDEX
Note:The ALIF 2112T and its power supply generate
heat when in operation and will become warm
to the touch. Do not enclose them or place them
in locations where air cannot circulate to cool
the equipment. Do not operate the equipment in
ambient temperatures exceeding 40oC. Do not
place the products in contact with equipment whose
surface temperature exceeds 40oC.
OPERATION
The optional brackets (plus four screws), allow the units
to be secured within a standard rack slot.
CONFIGURATION
Rack brackets
8
CONNECTIONS
OPERATION
CONFIGURATION
INSTALLATION
Installation involves linking the ALIF 2112T unit to various ports on the host computer,
while an ALIF RX unit is attached to your peripherals:
INDEX
IMPORTANT: When using an AdderLink Infinity Management box to configure
ALIF units, it is vital that all ALIF units that you wish to locate and control are set
to their factory default settings. Otherwise they will not be located by the A.I.M.
server. If necessary, perform a factory reset on each ALIF unit.
Please also see Appendix C - Tips for success when networking ALIF units
FURTHER
INFORMATION
Click a connection to see details
9
2 Connect the other end of the cable to an Ethernet switch.
INDEX
From your
Ethernet
switch
FURTHER
INFORMATION
OPERATION
To make a VNC link
1 Connect a CAT 5, 5e, 6, or 7 cable to the socket on the front panel of the ALIF unit.
CONFIGURATION
The ALIF 2112T contains a VNC server that
allows you to transmit a low-bandwidth
version of the video output across standard
networks to authorized remote viewers.
The VNC link can either be made over the
same network as the main ALIF output or
via a separate one. In either case, a separate
VNC network port is located on the left
side of the ALIF 2112T front panel for the
purpose.
INSTALLATION
VNC network link
10
Video link
INSTALLATION
ALIF dual units can simultaneously support
up to two Single Link high resolution video
displays at pixel clocks up to 165MHz; or
can alternatively support a single Dual
Link very high Resolution video display at
pixel clocks up to 330MHz (equating to an
example display mode of 2560 x 1600 at 60
Hz refresh).
D-1
To primary
video output
port
DV
I-
D-2
D-1
DV
I-
D-2
UT
ER
Note:When using one very high resolution DVI-D dual link display, use a DVI-D
Dual Link cable (such as the supplied Adder part:VSCD3) to connect the primary
video port of the computer system to the DVI-D-1 connector of the ALIF dual. A
dual link cable must also be used at the RX unit.
3 Connect the plug at the other end of the cable(s) to the corresponding DVI-D video
output socket(s) of the host computer.
CO
MP
UT
ER
FURTHER
INFORMATION
MP
DV
I-
To primary video output port
To secondary video output port
INDEX
CO
Note:When using two single
link DVI-D displays, connect
an additional video input from
the secondary video port of
the computer system using the
supplied secondary DVI-D link
cable.
OPERATION
DV
I-
CONFIGURATION
To make a video link
1 Wherever possible, ensure that power is disconnected from the ALIF and the host
computer.
2 Connect either one or two digital video link cables to the DVI-D socket(s) on the TX
unit rear panel:
11
Audio links
USB link
To make audio links
1 Connect an audio link cable between the IN
socket on the TX unit rear panel and
the speaker output socket of the host computer.
To make a USB link
1 Connect the type B connector of the supplied USB cable to the USB port on the TX
unit rear panel.
TIO
1
AU
X
1
NS
2
2
IN
Speaker link from
host computer
OU
T
USB link from
host computer
Microphone link
to host computer
2 [Where a microphone is to be used]: Connect a second audio link cable between the
OUT socket on the TX unit rear panel and the Line In socket of the host computer.
CONFIGURATION
OP
2 Connect the type A connector of the cable to a vacant USB socket on the
host computer.
OPERATION
D-1
FURTHER
INFORMATION
DV
I-
INSTALLATION
ALIF dual units act as USB 2.0 hubs and so
can provide four sockets at the RX unit with
only a single connection at the TX unit.
INDEX
ALIF dual units support two way stereo
digital sound so that you can use a remote
microphone as well as speakers.
12
Power in
To connect the AUX port
1 Ensure that power is removed from the ALIF unit.
2 Connect a suitable serial ‘null-modem’ cable (see Appendix M for pin-out) between a
vacant serial port on your computer and the AUX port on the right hand side of the
ALIF dual rear panel.
To apply power in
1 Attach the output lead from the power adapter to the 5V socket on the rear panel of
the unit.
T
1
5V
AU
X
A
Power cord
from adapter
Serial (null-modem) link
from your computer
2.5
1
Note: Ensure that
Options switches 1
and 2 are both in the
‘OFF’ (up) position
to enable normal
operation of the unit.
See Options switches
for details.
2 Connect the IEC connector of the supplied country-specific power cord to the socket
of the power adapter.
3 Connect the power cord to a nearby main supply socket.
Note: Both the unit and its power supply generate heat when in operation and will become
warm to the touch. Do not enclose them or place them in locations where air cannot circulate
to cool the equipment. Do not operate the equipment in ambient temperatures exceeding 40oC.
Do not place the products in contact with equipment whose surface temperature exceeds 40oC.
OPERATION
OP
FURTHER
INFORMATION
IN
US DOO
EO R
NL
Y
CONFIGURATION
Each ALIF dual unit is supplied with a power
adapter and country-specific power cord.
When all other connections have been
made, connect and switch on the power
adapter unit.
INDEX
The AUX port is an RS232 serial port that
allows extension of RS232 signals up to a
baud rate of 115200. The port has software
flow control, but no hardware flow control.
INSTALLATION
AUX port
13
High speed links
Optional Fiber Channel or
Active Copper SFP module
CAT 5, 5e, 6, or 7 link either
directly from the other ALIF
unit or from a Gigabit Ethernet
switch
2 Make your connection(s) between the chosen SFP module and either the other ALIF
dual unit or a suitable network switch:
Connect the transmit and receive
fiber optic links to the sockets on
the Fiber Channel SFP module.
Then close the latch over the link
connectors to lock them into place.
Transmit and
receive fiber links
2 Connect the other end of the cable either to the other ALIF dual unit or to a Gigabit
Ethernet switch, as appropriate.
3 [For connections via a network] repeat steps 1 and 2 for the other ALIF dual unit.
Cable and fiber details
• For direct links over Ethernet cable, the length of cable should not exceed 100
metres (328 feet). Network cables used for connections may be category 5, 5e, 6 or 7
twisted-pair cable. ALIF 2112T units have an autosensing capability on their network
interfaces, so for direct point-to-point connections, no ‘crossover’ Ethernet cable is
required.
• For direct links via fiber, varying distances can be achieved depending on the module
and cable types used. Please refer to the table in Appendix N for detailed information.
The fiber links must have crossovers.
or
Connect a CAT 5, 5e, 6, or 7 cable
to the socket on the Active Copper
SFP module.
CAT 5, 5e, 6, or 7 link
CONFIGURATION
IT
OPERATION
To link ALIF dual units using the System port
1 Connect a CAT 5, 5e, 6, or 7 cable to the System port socket on the front panel of the
TR
AN
ALIF dual unit.
SM
FURTHER
INFORMATION
1 Insert the appropriate optional SFP module
(SFP-MM-LC, SFP-SM-LC or
SFP-CATX-RJ45) into the aperture on
the ALIF dual front panel:
Please see Appendix C for important tips about networking ALIF units.
INDEX
To link ALIF dual units using the Teaming port
INSTALLATION
ALIF dual (inc 2112T) units can be either connected directly to each other or via a high
speed network. The connections can be copper-based Gigabit Ethernet as well as Fiber
Channel over Ethernet (FCoE). These can be used in parallel to provide up to 2 Gigabit
connections speeds.
A single System port (Gigabit Ethernet) is provided as standard on the right side of the
front panel. Additionally, the Teaming port, located just to the left, allows you to insert
either an optional Fiber Channel SFP module or Active Copper SFP module. The chosen
module can then allow either a fiber optic or additional Gigabit Ethernet link to be used
in parallel with the fixed System (Gigabit Ethernet) port.
14
Configuration
The System and Teaming ports
Uses the standard Ethernet port on the left side of the front panel and
provides lower-bandwidth image video feeds for use across standard
networks and the wider Internet.
These use either the Gigabit Ethernet or (optional) Fiber Channel
over Ethernet (FCoE) module, on the right side of the front panel
and provide high resolution DVI-D image, audio and peripheral feeds.
Please see Appendix B - The VNC port: Initial configuration for details.
Please see page 15 for details.
INDEX
The VNC port
FURTHER
INFORMATION
OPERATION
CONFIGURATION
INSTALLATION
The ALIF 2112T unit consists of two distinct sections (as detailed below) which each
have their own separate configuration procedures within this chapter.
15
SYSTEM AND TEAMING PORTS: INITIAL CONFIGURATION
ALIF 2112T units are designed to be as flexible as possible and this principle extends also
to their configuration.
INSTALLATION
CONFIGURATION
Where ALIF transmitters and receivers (all models) are connected via networked links,
you can either configure them individually, or configure them collectively using an A.I.M.
server:
• Configuring networked ALIF units individually - You need to specify the
network addresses of the ALIF units so that they can locate each other. This is done
by running the AdderLink Infinity browser-based configuration utility on a computer
system linked to the same network as the ALIF units.
• Configuring ALIF units collectively - The AdderLink Infinity Management
(A.I.M.) server allows you to configure, control and coordinate any number of ALIF
transmitters and receivers from a single application.
To perform a manual factory reset
1 Remove power from the ALIF unit.
2 Use a narrow implement (e.g. a straightened-out paper clip) to press-and-hold the
recessed reset button on the front panel. With the reset button still pressed, reapply power to the unit and then release the reset button.
OPERATION
Networked linking
A factory reset returns an ALIF transmitter or receiver unit to its default configuration.
You can perform factory resets using the AdderLink Infinity browser-based
configuration utility or by using this direct manual method.
IMPORTANT: When using A.I.M. to configure ALIF dual units, it is vital that all units
that you wish to locate and control are set to their factory default settings. Otherwise
they will not be located by the A.I.M. server. If necessary, perform a factory reset on
each ALIF dual unit.
Please also see Appendix C - Tips for success when networking ALIF units
Use a straightened-out paper clip to press
the reset button while powering on the unit
FURTHER
INFORMATION
Where ALIF transmitters and receivers (all models) are directly linked to each other,
very little configuration action is required, provided that they have their factory default
settings in place. If the standard settings have been changed in a previous installation, you
merely need to perform a factory reset on each unit.
Manual factory reset
After roughly eight seconds, when the factory reset has completed, five of the front
panel indicators will flash for a period of three seconds to indicate a successful reset
operation.
INDEX
Direct linking
16
To access the browser-based configuration utility
1 Temporarily connect the ALIF 2112T unit and your computer, as discussed left.
2 Run a web browser on your computer and enter the IP address of the ALIF dual port
that you are using.
The default settings are as follows:
System port
Teaming port
ALIF 2112T
RX units
169.254.1.33169.254.1.32
169.254.1.43169.254.1.42
Note:Where the port addresses of a unit have been changed and are not known, providing it
is appropriate to do so, perform a manual factory reset to restore the default addresses.
The opening page of the ALIF configuration utility should be displayed:
ww
w.a
d
der
.co
m
FURTHER
INFORMATION
Link from Ethernet
switch to the System
(Gigabit Ethernet) port
on the right side of the
front panel
OPERATION
To connect a computer system for browser-based configuration
1 Connect a suitable network cable to the Gigabit Ethernet port on the right side of the
ALIF 2112T front panel.
INSTALLATION
The browser-based configuration utility within all TX and RX units requires a network
connection between the Gigabit Ethernet port of the ALIF 2112T unit and a computer
on the same network. The configuration utility allows you to perform all of the following
functions:
• View/edit the IP network address and netmask,
• Configure separate IP network addresses for video, audio and USB,
• Configure multicast settings (on RX units),
• Configure video bandwidth settings (on TX units),
• View the current video output (on TX units),
• Perform a firmware upgrade,
• Perform a factory reset,
• Enable/disable and configure the VNC network port settings.
CONFIGURATION
AdderLink Infinity browser-based configuration utility
Use the menu options to choose
the required configuration page
You can find further information about the configuration pages within the following
appendix later in this guide:
• Appendix A - Transmitter (TX) unit configuration pages
INDEX
Note: It is also possible to gain access to the browser-based utility via the Teaming port.
2 Connect the other end of the link cable to your network.
3 Similarly, link your computer to the same network.
4 If not already switched on, power up your computer and the ALIF 2112T unit.You are
now ready to use the browser-based configuration utility.
17
CONFIGURATION
OPERATION
Setting the TX address and output signal details
1 Display the TX unit System Configuration page.
2 Ensure that the IP address and netmask for the System port and the Teaming port (if
used) are correct. The default settings of 169.254.1.33 and 169.254.1.43 for the two ports
respectively are their zero config addresses - these are usually changed to some other
address suitable for your installation. Indeed, the zero config address for the System port
MUST be changed before the Teaming port can be used for network connections.
3 Check that the data streams (Enable Video, Enable Audio and Enable USB - plus Enable
Serial, if used) are enabled as appropriate. There are similar options within the RX
unit configuration and it is important that the settings in both units are the same. If an
option is ticked in one unit but unticked in the other, then that data stream will remain
disabled. If you make a change, remember to click the Update Now button.
Optimizing the TX video signal
Note:Where the ALIF dual system is linked via two Gigabit links with sufficient available
bandwidth, there should be no need to alter the default settings on this page.
1 Display the TX unit System Configuration page and then change to the Video
Configuration page.
2 Make changes to the controls as necessary for each video port. There is no single
combination of adjustments that will suit all installations, but generally:
• If moving video images are being shown frequently, then leave Frame Skipping at a
low percentage and instead reduce the Peak Bandwidth Limiter and Colour Depth.
• Where screens are quite static, try increasing the Background Refresh interval and/or
increasing the Frame skipping percentage setting.
Make changes one at a time, in small steps, and view typical video images so that you
can attribute positive or negative results to the appropriate control.
See Video Configuration for individual explanations of the controls.
3Click Update Now to apply each setting change.
FURTHER
INFORMATION
In an ALIF dual system, the majority of configuration settings are dictated by the RX
units. Therefore, the local TX unit setup (using its browser-based configuration utility) is
usually concerned only with three main factors: Its IP address details, the data streams
to enable/disable and video signal optimization. Other TX unit pages, such as USB
Settings, System Messages, Firmware Upgrades and Reboot are generally not used or
altered during the majority of installations and are discussed elsewhere in this guide. See
Appendix A for explanations of all TX configuration page options.
INDEX
TX (transmitter) unit configuration
INSTALLATION
A rough guide to configuring TX and RX units
18
CONFIGURATION
OPERATION
Configuring the RX unit
1 Display the RX unit System Configuration page.
2 In the System Configuration section, ensure that the IP address and Netmask settings
for the System and Teaming ports for this RX unit are correct. The default settings
of 169.254.1.32 and 169.254.1.42 for the two ports respectively are their zero config
addresses - these are usually changed to some other address suitable for your installation.
Indeed, the zero config address for the System port MUST be changed before the
Teaming port can be used. Enter the new values and click the Update Now button.
The System IP Address that is set here will be sent to the TX unit as the destination
for transmitted data (when operating in unicast mode). The Gateway entry is only
necessary when the TX unit is located on a separate network to the RX unit.
3 Check that the data streams (Enable Video, Enable Audio and Enable USB - plus Enable
Serial, if used) are enabled (ticked) or disabled (unticked) as appropriate. There are
similar options within the TX unit configuration; If one of these options is ticked in
one unit but unticked in the other, then that data stream will remain disabled. If you
make a change, click the Update Now button.
4 If necessary, alter the Audio Input Type to match your audio input. The line option is for
a stereo line input, mic and mic boost are for mono microphones, the latter benefiting
from a +20dB gain boost.
FURTHER
INFORMATION
In an ALIF dual system, it is the RX unit (receiver) that determines where and how data
signals are sent (and received) by the TX unit. Although numerous topologies (oneto-one, one-to-many, many-to-one, etc.) are made possible by the ALIF system, they
are all dependent on two underlying modes of operation: either Unicast or Multicast
transmission. Where multicast transmission is not invoked for video and/or audio data,
operation will be automatically served by unicast network transmission technologies.
The RX unit setup (using the System Configuration page of its browser-based
configuration utility) is concerned with four main factors: Its own IP address(es), the data
streams to enable/disable, the IP address(es) of the TX unit and multicast transmission
details. Other pages, such as USB Settings, System Messages, Firmware Upgrades and
Reboot are generally not used or altered during the majority of installations. For further
details about RX unit configuration pages, please see the AdderLink Infinity dual guide.
INSTALLATION
RX (receiver) unit configuration
INDEX
continued
19
OPERATION
FURTHER
INFORMATION
• First, tick the Enable Multicast Video / Enable Multicast Audio check box.
• Next, enter appropriate Multicast Addresses for the System port Video/
Audio data stream(s). The set of IP addresses between 224.0.0.0 and
239.255.255.255 are specifically reserved for multicast operations. Within
a private enterprise network, you merely need to choose a location that is
currently unused. However, if your link will pass through public networks,
then attention must be given to finding an address within these limits that is
not already reserved for special use. The IANA (Internet Assigned Numbers
Authority) website: iana.org provides a list of publicly reserved addresses.
• Next, enter appropriate Multicast Address 2 entries for the Teaming port
Video/Audio data stream(s).
The video and audio multicast addresses must be different, as must the
System and Teaming ports The addresses that you enter will be used by the
RX unit to ‘listen-in’ on the video and audio data streams output by the TX
unit. The same IP addresses need to be set on every RX unit that will similarly
receive the video and audio data streams.
7 Click the Update Now button to save.
Repeat the IP addressing and multicast configuration steps for all RX units that
will be part of the one-to-many installation.
For most installations, the successful implementation of these configuration steps
will result in a correctly working system.
CONFIGURATION
INSTALLATION
The two Video and the single Audio Multicast sub-sections are configured in exactly
the same way:
INDEX
5 In the Target Transmitter Unit Settings section, you need to enter the System port and Teaming
port IP addresses for the TX unit that will be supplying the video, audio, USB and serial data
streams. This section allows you to determine which peripherals should use the second link.
Most often all streams are supplied by the same TX unit, so common System and Teaming port
addresses can be applied to all streams. However, it is possible to receive them from different
locations, in which case, click the blue arrow to reveal the separate video, audio, USB and serial
addresses. For all five peripherals, the System port of the targeted TX unit is always used to
carry the respective data streams; your choices involve which of those five should also use
the secondary Teaming port
link to spread the load(s). For
each peripheral, the first IP
address is that of the targeted
TX unit’s System port. IP
Address 2 corresponds to
the Teaming port and is used
only when the checkbox
above is ticked. The default
settings for all entries are the
standard IP addresses that
are factory set within every
TX unit (169.254.1.33 and
169.254.1.43). Change these to
the appropriate addresses on
your transmitter(s) and click
the Update Now button to
save and activate them.
6 For installations that will
include more than one RX
unit, for either video or audio
or both, then you need to
configure the Multicast Settings
section.
20
If the upgrade process is interrupted and fails, it may be necessary to switch to the
backup firmware image in order to regain operation. See right for details.
To upgrade a single unit via network link
1 Download the latest upgrade file from the Adder Technology website.
Note:There are separate upgrade files for TX and RX units.
2 Temporarily connect the ALIF 2112T unit and a computer via a network (see
AdderLink Infinity browser-based configuration utility section for details). 3 Run a web browser on your computer and enter the IP address of the ALIF 2112T
unit to be upgraded.
4 Click the Firmware Upgrade link. Within the Firmware Upgrade page, click the Choose
File button. In the subsequent file dialog, locate the downloaded upgrade file - check
that the file is correct for the unit being upgraded.
5 Click the Upgrade Now button. A progress bar will be displayed (however, if your
screen is connected to the unit being upgraded then video may be interrupted) and
the indicators on the front panel will flash while the upgrade is in progress.
6 The indicators should stop flashing in less than one minute, after which the unit will
automatically reboot itself. The upgrade process is complete.
Finding the latest upgrade files
Firmware files for the ALIF dual units are available from the Technical Support >
Updates section of the Adder Technology website (www.adder.com).
A pair of Options switches are located on the rear panel of every ALIF 2112T unit.
Each ALIF 2112T unit retains a backup firmware image which can be used in situations
where the primary firmware becomes corrupted (most often through failed upgrade
operations). Using the backup firmware will allow you to regain operation of the unit.
Option switch 1
OFF Normal operation using the main firmware
ON
Operate using the backup firmware image
Option switch 2 is reserved and must remain in the OFF (up) position for normal
operation.
INSTALLATION
Switch 1 - firmware image select
CONFIGURATION
WARNING: During the upgrade process, ensure that power is not
interrupted as this may leave the unit in an inoperable state.
OPTIONS SWITCHES
OPERATION
ALIF 2112T units are flash upgradeable using the method outlined here. However, for
larger installations we recommend that you use the AdderLink Infinity Manager (A.I.M.)
to upgrade multiple ALIF dual units. When using the method below, the ALIF dual unit will
be upgraded in sequence.
IMPORTANT: Upgrades must be performed on both the transmitters and
the receivers at the same time. Mixed firmware operation is not supported.
FURTHER
INFORMATION
PERFORMING AN UPGRADE
INDEX
Note: It is possible to downgrade the AdderLink Infinity firmware. After installing the older
firmware, perform a factory reset on each AdderLink Infinity in order to clear the configuration
file.
21
In operation, many ALIF dual installations require no intervention once configured. The
TX and RX units take care of all connection control behind the scenes so that you can
continue to work unhindered.
FRONT PANEL INDICATORS
CONFIGURATION
The six front panel indicators on each unit provide a useful guide to operation:
INSTALLATION
Operation
FURTHER
INFORMATION
INDEX
These six indicators clearly show the key aspects of operation:
• VNC On when a valid network is present on either the teaming or system port. Flashes to indicate that a VNC connection is present.
• SER On when the AUX (serial) port is enabled and active.
• AUD On when audio is enabled and active.
• USB On when USB is enabled and active.
• DVI On when the DVI Video channel is enabled.
• PWR Power indicator.
OPERATION
Indicators
22
1 On a network connected computer, locate and select the VNC viewer
icon 
A connection details dialog will be displayed:
Enter the ALIF 2112T address
here and click OK
Viewer options
(VNC viewer
only) Click the
VNC icon to
view the viewer
window options.
Ctrl Alt Del
Sends the
Ctrl Alt Del
sequence
to the
current host
computer.
Controls
Displays a menu
of options
concerning
keyboard, video
and mouse
operation.
Power
Click to access
the power on/
off options for
the current
host computer.
Dialog area
Indicates your username
and the host system that
you are currently viewing.
This area can also display
other messages.
If required, select the
encryption mode
INSTALLATION
USING THE VNC VIEWER
Hosts
Click to display a
list of computers.
Choose an entry
to connect to that
host computer.
Access mode
Allows you
to choose
between
Shared and
Private access
modes.
Configure
This option is
only available to
the admin user
and provides
access to the main
configuration
menus.
When using the viewer window
4 Enter your Username and Password and click the OK button. The viewer window
should now open Ü
What is the best screen resolution to use?
The best resolution for your computer is one that is larger than the screen of the host
computer that you are viewing.This will allow you to see everything without scrolling around.
Alternatively, the VNC viewer can be set to scale the image to fit your screen, but remember
that some pixel dithering effect will be seen when scaling is used.
How do I navigate around a larger screen?
If the screen that you are viewing has a larger resolution than your viewing window you
will need to scroll around to see all items. The viewer window allows you to ‘bump scroll’
(only in full screen mode). This means that when your mouse cursor bumps against the
edge of the screen, the screen image will scroll across automatically.
How do I escape from full screen mode?
Press the F8 button. This button is changeable but is most often set to F8.
How do I make the most of a slow connection?
The VNC viewer is slightly better suited to slower connections than the browser viewer
because it offers more options. Click the Options button of the VNC viewer when
entering the ALIF 2112T address during log on.
Rate limit mouse events
When selected, this mode greatly reduces the mouse movement data that are sent to
the host computer. When you move the local mouse, the remote cursor will catch up
roughly once per second.
OPERATION
Auto calibrate
This button will
calibrate the
mouse, but only
when relative
mouse mode is
selected.
FURTHER
INFORMATION
Re-sync mouse
Ensures that the mouse
pointer which you
move and the mouse
pointer on the host
system are correctly
synchronized.
INDEX
2 In the ‘Server:’ entry, type the network address that has been configured for the VNC
port of the ALIF 2112T unit.
3 Click the OK button. The viewer window may open straight away or the system may
require user authentication, in which case an authentication dialog will be displayed:
CONFIGURATION
Options button
Provides a range of viewer and connection settings - MORE [+]
23
Further information
• Technical support – www.adder.com/contact-support-form
For technical support, use the contact form in the Support section of the
adder.com website - your regional office will then get in contact with you.
CONFIGURATION
• Adder Forum – forum.adder.com
Use our forum to access FAQs and discussions.
OPERATION
• Online solutions and updates – www.adder.com/support
Check the Support section of the adder.com website for the latest solutions and
firmware updates.
FURTHER
INFORMATION
If you are still experiencing problems after checking the information contained within this
guide, then we provide a number of other solutions:
INSTALLATION
GETTING ASSISTANCE
INDEX
This chapter contains a variety of information, including the following:
• Getting assistance - see right
• Appendix A - Transmitter (TX) unit configuration pages
• Appendix B - The VNC port: Initial configuration
• Appendix C - Tips for success when networking ALIF units
• Appendix D - Troubleshooting
• Appendix E - Glossary
• Appendix F - Configuration menus (via VNC)
• Appendix G - VNC viewer connection options
• Appendix H - VNC viewer window options
• Appendix I - Java viewer options
• Appendix J - The KVMADMIN utility
• Appendix K - Known working video modes
• Appendix L - Hotkey sequences
• Appendix M - Cable pinouts, video modes and general specifications
• Appendix N - Fiber modules and cables
• Safety information
• Warranty
• Radio frequency energy statements
24
CONFIGURATION
OPERATION
FURTHER
INFORMATION
INDEX
This section covers the browser-based configuration utility for the AdderLink Infinity TX
(transmitter) unit. The TX utility has ten pages, titled as follows:
• System Configuration
• System Messages
• Video Configuration
• Statistics
• USB Settings
• Firmware Upgrade
• Security
• Reboot
• AIM Manager
• About
INSTALLATION
APPENDIX A - Transmitter (TX) unit configuration pages
25
TX System Configuration
Enable options
These checkboxes allow you to determine which peripheral options will be used:Video, audio, USB and serial.
Serial port options
These allow you to match the serial configuration being used by the attached PC host.
Identify unit
When clicked, these buttons cause the front panel indicators to flash to assist with identifying the ALIF unit
within a rack.
• The Identify Unit (short) button flashes the indicators for five seconds.
• The Identify Unit (long) button flashes the indicators for one hour but can be overridden by clicking the
Identify Unit (short) button.
Target Multicast Configuration
The items within this section are required if a multicast group is being arranged i.e. many receivers connected
to the one transmitter. For the video port(s) and/or audio channel, you need to enter the multicast IP
addresses. In each case, the first address relates to the System (Gigabit Ethernet) port and the second address
to the optional Teaming port.
In previous revisions of firmware, the destination IP address for video was decided by the RX. If multiple RX
units requested the same video source then all had to provide the same multicast destination IP address. In
revision 3.3 and above, the TX now decides the destination IP address for video and automatically informs any
interested RX units. In a system with a mix of new and old units, both RX and TX units must be configured
with the same destination IP address for video.
CONFIGURATION
Teaming port
Determines whether the SFP socket on the right side of the front panel is enabled and which IP address details
it should use. The default IP address is 169.254.1.43 which is the zero config IP address that allows the unit to
work immediately in point-to-point mode.You are recommended to change this to an appropriate address in
the private IP range 192.168.xxx.xxx The default netmask is 255.255.0.0. If you change the IP address to the
private range, you are recommended to change this to 255.255.255.0
The default gateway address is 169.254.1.1 Note: Before the Teaming port can be used for connection via a network,
you need to ensure that the System port has been configured away from its zero config IP address.
OPERATION
VNC port
Determines whether the port on the left side of the front panel is enabled and which IP address details it
should use. The default IP address is 192.168.1.42.
FURTHER
INFORMATION
System port
This section determines the IP address, netmask and gateway details for the main Gigabit Ethernet port located
on the right side of the front panel. The default IP address is 169.254.1.33 which is the zero config IP address
that allows the unit to work immediately in point-to-point mode.You are recommended to change this to an
appropriate address in the private IP range 192.168.xxx.xxx
The default netmask is 255.255.0.0. If you change the IP address to the private range, you are recommended to
change this to 255.255.255.0 The default gateway address is 169.254.1.1
INDEX
Unit Description
Allows you to optionally add a description of the unit, such as its location. Useful when many ALIF units are
being used.
INSTALLATION
Unit Name
Name details that you can alter to distinguish this unit from all others. The name entered here will be read by
A.I.M. units (if used) for administration purposes.
Note: All multicast addresses for each service endpoint must be unique across the whole ALIF installation.
26
Background Refresh
The TX unit sends portions of the video image only when they change. In order to give the best user
experience, the TX unit also sends the whole video image, at a lower frame rate, in the background. The
Background Refresh parameter controls the rate at which this background image is sent. The default value is
‘every 32 frames’, meaning that a full frame is sent in the background every 32 frames. Reducing this to ‘every
64 frames’ or more will reduce the amount of bandwidth that the TX unit consumes. On a high-traffic network
this parameter should be reduced in this way to improve overall system performance. Options: every 32 frames,
every 64 frames, every 128 frames, every 256 frames or disabled.
Enable Magic Eye
This feature, enabled as standard, aims to reduce the effect of dithering - a technique used by some graphics
cards to improve the perceived quality and color depth of images by diffusing or altering the color of pixels
between video frames. The Magic Eye feature increases the frame rate and eliminates unnecessary network
traffic by ignoring the color dithering where it occurs. If the video source is not noisy or dithered then you can
switch off Magic Eye to enable full color accuracy.
Use Default DDC and Choose Default DDC
When the Use Default DDC option is unticked, AdderLink Infinity will use the EDID that is reported by the
monitor connected to the receiver unit. However, if you tick the Use Default DDC option, you can then select
from a range of preset video resolutions from the Choose Default DDC drop down box. Once selected, the TX
will report itself capable of only supporting this one video resolution. Please note that all of the listed video
resolutions are single link DVI with a maximum pixel clock of 165MHz and a 60Hz refresh rate.
CONFIGURATION
Note: All of the following controls are available separately for each video port:
OPERATION
Peak bandwidth limiter percentage
The TX unit will employ a ‘best effort’ strategy in sending video and other data over the IP network. This means
it will use as much of the available network bandwidth as necessary to achieve optimal data quality, although
typically the TX unit will use considerably less than the maximum available. In order to prevent the TX unit
from ‘hogging’ too much of the network capacity, you can reduce this setting to place a tighter limit on the
maximum bandwidth permissible to the TX unit. Range: 0 to 95%.
INSTALLATION
TX Video Configuration
Period of Hot Plug Detect signal
This is the length of time that a hot-plug detect signal is applied. The default of 25mS is sufficient for the
majority of graphics cards, however, a small minority may need to be given a longer a period.
Frame skipping percentage
Frame Skipping involves ‘missing out’ video frames between those captured by the TX unit. For video sources
that update only infrequently or for those that update very frequently but where high fidelity is not required,
frame skipping is a good strategy for reducing the overall bandwidth consumed by the system. Range: 0 to 100%.
FURTHER
INFORMATION
Enable Hot Plug Detect...
When this option is ticked, every time the monitor is changed at the receiver unit, a hot plug detect message
will be sent to the graphics card of the PC attached to the TX unit.
Compression
Determines the (AFZ and AFZ+) compression method used for video transmission. Choices are:
• ‘Adaptive’ - guarantees frame rate, builds to pixel perfect,
• ‘Smoothest video’ - forces the maximum compression, or
To get here
1 Connect your computer to the Management port on the left side of the front panel.
2 Run a web browser and enter the IP address of the Management port: http://192.168.1.42
If the address is unknown, perform a manual factory reset.
3 If necessary, click the Video Configuration link.
• ‘Advanced’ - allows you to choose a fixed compression mode:
• ‘AFZ only (pixel perfect),
• ‘AFZ+ Minimum compression’,
INDEX
• ‘Pixel perfect’ - only uses pixel perfect AFZ,
• ‘AFZ+ Middle compression’, or
• ‘AFZ+ Maximum compression’.
27
Enable Dummy Boot Keyboard
When ticked, the TX unit reports a virtual dummy boot keyboard to the attached PC to ensure that a
keyboard is always reported when the PC boots up. The dummy boot keyboard uses one of the 13 USB
endpoints, therefore if all 13 endpoints are required elsewhere for USB devices (or a KVM switch only supports
two HID devices) then it can be disabled by deselecting this option. See also Reserved Port Range below.
Disable Hi-Speed
This option allows you to force the system to run at the low/full USB speed of 12Mb/s, thus forcing USB 2.0 HiSpeed devices to adapt to the lower rate.
INSTALLATION
TX USB Settings
Control Encryption
This setting determines whether encryption should be applied to the control data passed across the link. Note
that video data is never encrypted.
Secure Web pages with password
When ticked, this option enables https security so that the configuration pages are only accessible to the admin
user with a password.
Change/confirm password
These options allow you to change the admin password for the system.
To get here
1 Connect your computer to the Management port on the left side of the front panel.
OPERATION
USB Encryption
This setting determines whether encryption should be applied to the USB data passed across the link. Note
that video data is never encrypted.
FURTHER
INFORMATION
TX Security
INDEX
Reserved Port Range
For some devices, e.g. touch screens, you may wish to ensure that they are always reported to the same USB
port number so that the USB driver will always find the device. This option allows you reserve up to 8 ports
for certain devices. At the RX unit, the devices are assigned to the reserved ports. If a port reservation is to be
applied, then the dummy boot keyboard should be disabled. The default value for this option is ‘0’, i.e. disabled.
See Port Reservation on the RX unit for further details.
CONFIGURATION
Hub Size
Using this option you can select whether the transmitter should report itself as a 13 or a 7 port USB hub.
Some USB hosts are only able to support 7 port USB hubs. If this option is set to 7, then only 7 USB devices
are supported by the PC.
2 Run a web browser and enter the IP address of the Management port: http://192.168.1.42
If the address is unknown, perform a manual factory reset.
3 Click either the USB Settings or Security links, as appropriate.
28
TX AIM Manager
CONFIGURATION
INSTALLATION
Enable AIM Control
Click this button to allow an A.I.M. (Adder Infinity Manager) box to take control of this TX. When the button is
clicked, the TX unit will be rebooted to allow the A.I.M. box to discover and control it.
Enable system messages
Tick to allow the creation of status and error messages by the unit.
Send system messages to remote Log Server
Choose this option to send the system messages to a remote server via the network. Provide the IP address of
a suitable server here also.
OPERATION
TX System Messages
To get here
1 Connect your computer to the Management port on the left side of the front panel.
2 Run a web browser and enter the IP address of the Management port: http://192.168.1.42
If the address is unknown, perform a manual factory reset.
INDEX
Update Now
Click to save and implement any changes that you make.
FURTHER
INFORMATION
Store system messages in unit
When ticked, this option will store system messages within the memory of the unit. Click the View messages
button to view the list or the Clear messages button to delete the list.
3 Click either the AIM Manager or System Messages links, as appropriate.
29
TX Statistics
Note: Only the System port is measured.When the Teaming port is also used, the bandwidth will be shared equally
so the figures shown for the System port will apply also to the Teaming port. For instance, if the graph shows 500Mbit
bandwidth, then the total bandwidth will be 1 Gigabit.
TX Firmware Upgrade
Reboot
Use this page to perform a reboot or a factory reset. Please see the section Manual factory reset for details.
To get here
1 Connect your computer to the Management port on the left side of the front panel.
INDEX
TX Reboot
FURTHER
INFORMATION
OPERATION
Upgrade
Use this page to upgrade the main or backup firmware image on the unit. Please see the section Performing an
upgrade for details.
CONFIGURATION
Submit
Click this button after ticking the above checkbox to plot the chosen statistics on a pop up graph.
INSTALLATION
Enable collection of bandwidth statistics
The ALIF dual unit can record data transfer statistics from the System port and plot them on a graph for
troubleshooting and optimization purposes. When you enable this option, you will first be presented with a pop
up from which you can choose which aspects you would like to graph: Data throughput, various packet rates
and/or frame rates.
2 Run a web browser and enter the IP address of the Management port: http://192.168.1.42
If the address is unknown, perform a manual factory reset.
3 Click either the Statistics , Firmware Upgrade or Reboot links, as appropriate.
30
TX About
To get here
1 Connect your computer to the Management port on the left side of the front panel.
OPERATION
CONFIGURATION
INSTALLATION
About
This page displays key information about the TX unit that may be requested by Adder Technical Support.
INDEX
3 If necessary, click the About link.
FURTHER
INFORMATION
2 Run a web browser and enter the IP address of the Management port: http://192.168.1.42
If the address is unknown, perform a manual factory reset.
31
APPENDIX B - The VNC port: Initial configuration
http://192.168.1.42
The ALIF 2112T welcome screen
should be displayed:
To download a VNC Viewer
To download a (free) VNC Viewer for a desktop or notebook computer, visit the
download page of the RealVNC website:
http://www.realvnc.com/download/viewer
To download a VNC Viewer app for a tablet or smartphone, visit the Apple or Android
app store, or look at the RealVNC website (www.realvnc.com) for further information.
To use the Java VNC Viewer
1 Connect the ALIF 2112T to an IP network where a suitable computer is available on
the same subnet (please see the Installation chapter for connection details).
2 On that computer, open an internet browser and enter the default IP address used by
the ALIF 2112T:
http://192.168.1.42
The ALIF 2112T welcome screen should be displayed (as shown left).
3 Click the link Connect using built-in Java VNC Viewer. The Java viewer will load and run
inside the browser. For more details see Appendix I - Java viewer options.
CONFIGURATION
Note on viewers
The windows VNC viewer supplied by the unit is 4.4.3se4. On the Real VNC website you
will find later viewers V5. The V5 viewers support a newer 256 bit encryption technique.
However,Virtual media functionality is not supported in V5 viewer.
OPERATION
To download a Windows VNC Viewer from the ALIF 2112T unit
Note:The version of VNC supplied within the ALIF 2112T supports virtual media.
1 Connect the ALIF 2112T to an IP network where a suitable computer is available on
the same subnet (please see the Installation chapter for connection details).
2 On that computer, open an internet browser and enter the default local IP address
used by the ALIF 2112T:
3 Click the link ‘Download the Windows VNC Viewer from unit’.
4 Once the file is downloaded, run it and follow the on screen instructions to open a
VNC connection to the ALIF 2112T. (The VNC Viewer is a single executable file which
does not require an ‘installation’ step. Simply put the file in a suitable place (such as the
Desktop) and run it from there.)
FURTHER
INFORMATION
Configuration of the VNC port section of the ALIF 2112T is carried out via a network,
using a VNC Viewer program running on a computer or mobile device.VNC Viewers are
available for most computers, tablets and smartphones.
• If you already have a VNC viewer, please follow the Initial configuration instructions
given on the next page.
• If you do not already have a VNC viewer, there are three options:
• You can download a Windows VNC Viewer from the ALIF 2112T itself.
• You can download the latest VNC Viewers for most operating systems via the
RealVNC website, or for tablets and smartphones from the appropriate app store.
• Without downloading anything, you can run a Java version of the VNC Viewer inside
your web browser.
INDEX
Initial connection to the VNC port
INSTALLATION
This section deals with the initial configuration of the VNC port of the ALIF 2112T unit.
For details about the main System and Teaming ports, please see here.
The default IP address of the VNC port is 192.168.1.42; it is possible to change this
either through the VNC viewer or via the TX System Configuration page.
32
Initial configuration
To perform the initial configuration
1 Connect the ALIF 2112T to an IP network (using the VNC port) where a suitable
computer is available on the same subnet (please see the section VNC network link
for connection details).
2 Use a computer connected to the same subnet of the network. On that
computer, locate and select the VNC viewer icon 
A connection details dialog will be displayed:
5Enter admin as the Username, leave the password entry blank and click the OK
button. The viewer window should now open:
INSTALLATION
To perform the initial configuration, you need to connect the ALIF 2112T to an IP
network and use a computer located on the same network to connect to it.
Options button
Provides a range of viewer and connection settings - MORE [+]
3 In the ‘Server:’ entry, type the address: 192.168.1.42
4 Click the OK button. The viewer window may open straight away (if so continue at
step 6) or the system may require user authentication in which case an authentication
dialog will be displayed:
Use the various options
(particularly the ‘Unit
Configuration’ and ‘Network
Configuration’ options) to
arrange the ALIF 2112T to
suit your requirements.
See Appendix F Configuration menus.
Note:To ensure that the Configuration menu is correctly displayed within the VNC viewer, the
ALIF 2112T must be connected to the video output of its host computer.
OPERATION
If required, select the
encryption mode
FURTHER
INFORMATION
6 Click the Configure button to display the Configuration menu:
INDEX
Enter the ALIF 2112T address
here and click OK
CONFIGURATION
Click the Configure button
33
Controls
When clicked, this button reveals a menu of options
concerned with keyboard, video and mouse operation.
Refresh Screen
Click to produce a single
mouse click for the left,
centre or right mouse
buttons
Click to produce a
continuous mouse click
and hold for the left,
centre or right mouse
buttons
button on the menu bar and re-synchronizes
This option refreshes the whole screen image to remove any artefacts from moved
screen items. This is useful when using very low refresh rates on slow speed
communication links.
Click to move the
remote mouse cursor up,
down, left or right
INSTALLATION
CONFIGURATION
This option has the same effect as the
the local and remote mouse pointers.
This option displays a mouse control dialog and is useful when the remote cursor is
failing to respond correctly to your mouse movements, even after using the Resync
mouse option.
The mouse control dialog allows you to control the remote mouse cursor using a
selection of buttons that you click with your local mouse.
Click to calibrate the
remote mouse
Click to
display the
Advanced Mouse
Configuration
dialog. See next
page.
When ticked the unit
will attempt to switch to
Absolute Mouse mode
(recommended). If the
computer does not
support this then it will
display a warning and
return to relative mouse
mode.
OPERATION
Resync Mouse
Mouse Control
FURTHER
INFORMATION
This mode is for fast network connections where the cursor
response is sufficient to provide instant visual feedback on
the remote screen. When enabled, the cursor is ‘captured’
within the viewer window until you use the ‘escape’ hot keys.
To quit from single mouse mode, press F8 and then P.
Alternatively, enable and use the mouse button escape
sequences - see Advanced unit configuration for details.
The single mouse mode does not require calibration.
INDEX
Single Mouse Mode
34
Advanced mouse configuration
Info
When selected, this option displays an information dialog showing the current logged on
users, the current host, its video mode and its mouse motion details.
OPERATION
To switch a system on or off
1 Use the Hosts button to select the required computer.
2 Click the Power button and then select the Switch on or
Switch off option, as appropriate.
FURTHER
INFORMATION
The available Change Motion schemes are: Constant, XFree86,Windows Pre-XP,Windows
XP,Windows XP SP2, OS/2, Solaris, Solaris 9 and Mac OSX. Most of these offer the Speed
setting as the only option, however, the Windows Pre-Xp and XFree86 options contain
many other parameters.
When the Absolute Mode option is ticked in the main Mouse Control menu, this dialog
allows you to adjust the Absolute Offset scale:
When configured (and where you have access rights) this option allows you to control
the mains power input to the currently selected host computer.
Note:This option is generally used to power cycle remote systems that have failed to respond.
Before switching a system off, ensure that all attempts have first been made to power it down
through normal means.
An optional power switch is required to be connected to the AUX port of the ALIF 2112T
unit in order to control the mains power input into the associated computer. See also Power
switching configuration.
INDEX
Power switching
CONFIGURATION
INSTALLATION
This dialog allows the mouse acceleration to be configured according to the operating
system in use and also permits manual fine tuning for situations where problems are
encountered with the Calibrate function.
For best results, choose the appropriate Change motion: entry to match the host in use.
35
INSTALLATION
This option provides a range of options related to the video configuration.
CONFIGURATION
Click to send
the code
Click to send the
contents of the
clipboard to the host
When entering codes:
+ means press down the key that follows
– means release the key that follows
+– means press down and release the key that follows
* means wait 250ms (note: if a number immediately follows the asterisk, then the delay will equal the number, in milliseconds)
It is automatically assumed that all keys specified will be released at the end, so there is
need to specify -Ctrl or -Alt if these keys are to be released together.
Examples:
‘Ctrl + Alt 12’ would be expressed as: +Ctrl+ Alt+1–1+2
+N means press the ‘N’ key
+Scroll means press the Scroll lock key
+Space means press the space key
Note: If using the Paste Clipboard feature, within the VNC viewer properties, ensure that in the
Inputs section, the Share clipboard with server option is enabled. See Appendix G for details.
Video source
Selects which video input to
use. It is possible to display
both single head screens (if
connected) or select one
over the other. If you are
viewing Dual-Link video
resolutions, only one head
will be available.
Use Remote DDC
Uses the DDC of the
monitors connected to the
ALIF Reciever. If this option
is un-ticked you can select a
DDC to use that is reported
by the ALIF 2112T.
Hot Plug Detect
When ticked, allows you to
choose one of four hot plug
detect periods when, after
a display is connected, the
DDC information is sought.
Ignore Dithering
Dithering is a technique used by some
graphics cards to improve perceived image
quality by continuously slightly varying the
color of each pixel. This gives the illusion
of more shades of color than the display
can really reproduce, and smooths the
appearance of gradually shaded areas in
images. Unfortunately, dithering is an issue
for KVM extenders because it makes the
image appear to be changing all the time
even when it is static. This means that a
great deal of unnecessary network data is
sent to the VNC viewer, reducing the video
frame rate and making mouse response
appear slow.
The ‘Ignore Dithering’ option works by
ignoring small variations in the video from
frame to frame. This increases performance
and reduces network traffic when the
host computer is an Apple Mac or another
computer that has dithered video output.
It also improves performance if the video
source is noisy (e.g. from a camera or a
VGA-to-DVI converter). ‘Ignore Dithering’
is disabled by default to give full color
accuracy and the best possible frame rate
from non-dithered video sources.
Threshold
Adjusts the level of dithering
noise that is ignored. The ‘Auto’
button attempts to choose a
suitable value automatically, but
the level can also be adjusted
manually using the slider or
arrow buttons. The best value
is of course a compromise
between capturing all the ‘real’
screen changes whilst ignoring
the (almost invisible) dithering
noise. A good way to choose
the value is to watch the
Display Activity indicator for a
static screen. If the Threshold
is too low, the Display Activity
will be a high percentage while
nothing is really changing. If
the Threshold is too high, the
Display Activity will be very
low (or zero) but some real
changes in the screen may be
missed.
OPERATION
Enter the
code here
Video settings
FURTHER
INFORMATION
This option displays a keyboard control dialog and is useful for sending keyboard
combinations (to the host) that are needed regularly or that are trapped by the ALIF
2112T.
INDEX
Keyboard Control
36
Note:When using Adder Virtual Media features, within the VNC viewer properties, ensure that
in the Inputs section, the Share clipboard with server and the Enable file transfer options are
enabled. See Appendix G for details.
To select and remotely transfer files from the viewer computer
1 On the remote system, log into the ALIF 2112T using the VNC viewer.
2 Invoke the “Send Files” feature of the VNC viewer (called “File Transfer” in later
versions), either by clicking the icon on the viewer’s toolbar or selecting from the F8
menu.
3 The viewer will display a window allowing you to select files or a whole folder.
Highlight the required files or folders (up to a maximum of 2GB) that you wish to
transfer to the host computer and click the Open button. The new disk drive should
appear on the host a few seconds later.
Note:The Use Entire Folder button provides a quick way to select a whole folder while you are
viewing its contents.
Note: Remember, at this point the selected files/folders have not yet been transferred to the
host system, they are just visible there.
4 On the host computer (via the VNC viewer) locate the new virtual drive (shown as a
Removable Disk) and copy the files to the required location on the host computer.
CONFIGURATION
OPERATION
There are several methods of doing this. The easiest method depends on whether:
• The files are already on the clipboard of the viewer computer (following an Edit ->
Copy operation). See To remotely transfer files from the clipboard >>
or
• The files still need to be selected. See To select and remotely transfer files from the
viewer computer >>
Click the Create VM Drive button to announce file availability to the host computer,
whereupon a popup will confirm that the new virtual media disk is built.
Note: Remember, at this point the selected files/folders have not yet been transferred to the
host system, they are just visible there.
4 On the host computer (via the VNC viewer) locate the new virtual drive (shown as a
Removable Disk) and copy the files to the required location on the host computer.
FURTHER
INFORMATION
Remotely transferring files to the host as a virtual disk drive
To remotely transfer files from the clipboard
1 On the remote system, log into the ALIF 2112T using the VNC viewer.
2 If not already done, use Windows Explorer to locate and copy the required file(s), or
folder(s) to the clipboard.
3 Within the VNC viewer window, click the Controls button and then select the Virtual
Media option. A popup similar to the following will be displayed:
INDEX
The Adder Virtual Media feature allows you to remotely make files available to a host
computer that is linked to the ALIF 2112T. Disk drives, single files or collections of
files and folders up to 2GB in size can be mounted via the VNC link, and appear as a
read-only disk on the host. This can prove to be an invaluable tool when upgrading host
computers from remote positions.
Note:The file transfer is in one direction only, from viewer to host.
Note: Adder Virtual Media does not currently work with Apple Mac systems.
In order to use the Adder Virtual Media feature, the VM link must be made between the
ALIF 2112T and a USB port on the host computer. See USB link for details.
There are two main ways to use Adder Virtual Media:
• Create a read-only ‘virtual disk drive’ on the host from one or more files chosen at
the viewer end. This is useful for copying one or more files from the computer running
the VNC viewer to the host computer. See below.
• Export a disk drive (e.g. CD, DVD or USB flash drive) from the viewer computer so
it appears as a disk on the host attached to ALIF 2112T. A particular use for this is for
booting or upgrading the remote host from a CD or other media that you have at the
viewer end. See next page.
INSTALLATION
Virtual Media
37
Remotely exporting a disk drive to the host
3 You can select an entire drive or a disk image (e.g. .iso) file:
• Select a disk drive: Click the checkbox adjacent to the listed disk drive that you
wish to make available to the host computer,
or
• Add a Disk Image File: Select the disk image file and click Open.
4 In the Virtual Media dialog box, click the OK button to announce the availability of the
drive to the host computer. On the host computer, the new drive will appear in the
same way as any removable drive would on your computer.
Note: Remember, at this point the selected drive has not yet been transferred to the host
system, it is just visible there.
5 On the host computer (either directly or via the VNC viewer) locate the new virtual
drive (shown as a Removable Disk) and copy the files to the required location on the
host computer.
Note:The Remote File or Folder section of this Virtual Media dialog box provides yet another
method of creating a virtual drive from some files or folders, as described above.
CONFIGURATION
OPERATION
Remote Files or Folders
Click Browse to search for
and select single or multiple
files/folders to be copied to
the host computer.
FURTHER
INFORMATION
When the Create ISO Image
option is ticked this creates
a bootable disk so that it’s
possible to boot the host
computer from the virtual
media drive.
INDEX
Remote Drive(s)
This section lists any located
storage devices on the
remote system that are 2GB
or less, and which could be
copied en masse to the host
computer, if desired.
INSTALLATION
1 On the remote system, log into the ALIF 2112T using the VNC viewer.
2 Press F8 and then V to display a Virtual Media dialog box:
38
Editing the viewer window menu bar
To edit the menu bar via admin
1 Login remotely via VNC viewer as admin user and display the viewer window.
2 Click the Configure button in the top right corner of the viewer window.
3 Click the User Accounts button.
4 Against the entry for the required user, click the Menu Bar Edit button. The following
dialog will be displayed:
CONFIGURATION
To edit the menu bar locally
1 Login remotely via VNC viewer and display the viewer window.
2 Place the mouse pointer on the menu bar and click the right mouse button. A popup
will be displayed:
INSTALLATION
If required, you can customize the menu bar of the viewer window to ensure that it
contains only the necessary options.
The menu bar can be edited locally by each user or edited singly by the admin or
alternatively, the admin can globally alter the menu bar for all users.
OPERATION
3 Click on any option within the popup to add it to or remove it from the menu bar.
4 When all changes have been made, click anywhere else within the viewer window.
Changes made in this way will affect the individual user only.
5 Select/deselect the items that you wish to appear on the menu bar. As you do so, the
Menu bar appearance image will show how the bar will look using your edited settings.
6 Optional: To globally apply your changes, tick the Apply to all users on Save option.
7 Click the Save button.
INDEX
FURTHER
INFORMATION
Note: The local menu bar edit popup shown above will
only appear if the Enable direct right click Menu editing
option is ticked within the Gui Edit Configuration
screen (for that user) as shown right.
39
APPENDIX C - Tips for success when networking ALIF units
Layer 2 switches are what bind all of the hosts together in the subnet. However, they are
all not created equally, so choose carefully. In particular look for the following:
• Gigabit (1000Mbps) or faster Ethernet ports,
• Support for IGMP v2 (or v3) snooping,
• Support for Jumbo frames up to 9216-byte size,
• High bandwidth connections between switches, preferably Fiber Channel.
• Look for switches that perform their most onerous tasks (e.g. IGMP snooping) using
multiple dedicated processors (ASICS).
• Ensure the maximum number of concurrent ‘snoopable groups’ the switch can
handle meets or exceeds the number of ALIF transmitters that will be used to create
multicast groups.
• Check the throughput of the switch: Full duplex, 1Gbps up- and down- stream speeds
per port.
• Use the same switch make and model throughout a single subnet.
• You also need a Layer 3 switch. Ensure that it can operate efficiently as an IGMP
Querier.
Layer 2 (and Layer 3) switches known to work
• Cisco 2960
• Extreme Networks X480
• Cisco 3750
• HP Procurve 2810
• Cisco 4500
• HP Procurve 2910
• Cisco 6500
• H3C 5120
• HuaWei Quidway
s5328c-E1 (Layer 3)
For the latest list of switches known to work
with ALIF and setup instructions for them,
please go to www.adder.com
The recommended layout
The layout shown below has been found to provide the most efficient network layout for
rapid throughput when using IGMP snooping:
INSTALLATION
CONFIGURATION
Choosing the right switch
OPERATION
• Choose the right kind of switch.
• Create an efficient network layout.
• Configure the switches and devices correctly.
Network layout is vital. The use of IGMP snooping also introduces certain constraints, so
take heed:
• Keep it flat. Use a basic line-cascade structure rather than a pyramid or tree
arrangement.
• Keep the distances between the switches as short as possible.
• Ensure sufficient bandwidth between switches to eliminate bottlenecks.
• Where the A.I.M. server is used to administer multiple ALIF transceivers, ensure the
A.I.M. server and all ALIF units reside in the same subnet.
• Do not use VGA to DVI converters, instead replace VGA video cards in older systems
with suitable DVI replacements. Converters cause ALIF TX units to massively increase
data output.
• Wherever possible, create a private network.
FURTHER
INFORMATION
Summary of steps
Creating an efficient network layout
Note: From firmware version 3.1, tree and hierarchical structures of network switches are also
supported.The Transmitter now joins its own multicast group so there is always a route from
the querier to the transmitter which was previously missing in earlier firmware versions.
• Use no more than two cascade levels.
• Ensure high bandwidth between the two L2 switches and very high bandwidth
between the top L2 and the L3. Typically 10GB and 20GB, respectively for 48 port L2
switches.
continued
INDEX
ALIF units use multiple strategies to minimize the amount of data that they send
across networks. However, data overheads can be quite high, particularly when very
high resolution video is being transferred, so it is important to take steps to maximize
network efficiency and help minimize data output. The tips given in this section have been
proven to produce very beneficial results.
40
CONFIGURATION
OPERATION
FURTHER
INFORMATION
INDEX
The layout is vital but so too is the configuration:
• Enable IGMP Snooping on all L2 switches.
• Ensure that IGMP Fast-Leave is enabled on all switches with ALIF units connected
directly to them.
• Enable the L3 switch as an IGMP Querier.
• Enable Spanning Tree Protocol (STP) on all switches and importantly also enable
portfast (only) on all switch ports that have ALIF units connected.
• If any hosts will use any video resolutions using 2048 horizontal pixels (e.g. 2048 x
1152), ensure that Jumbo Frames are enabled on all switches.
• Choose an appropriate forwarding mode on all switches. Use Cut-through if available,
otherwise Store and forward.
• Optimize the settings on the ALIF transmitters:
• If moving video images are being shown frequently, then leave Frame Skipping at a
low percentage and instead reduce the Peak bandwidth limiter.
• Where screens are quite static, try increasing the Background Refresh interval and/
or increasing the Frame skipping percentage setting.
Make changes to the ALIF transmitters one at a time, in small steps, and view typical
video images so that you can attribute positive or negative results to the appropriate
control.
• Ensure that all ALIF units are fully updated to the latest firmware version (at least
v2.1).
INSTALLATION
Configuring the switches and devices
41
CONFIGURATION
Remedies:
• Ensure that IGMP snooping is enabled on all switches within the subnet.
• Where each ALIF unit is connected as the sole device on a port connection to
a switch, enable IGMP Fast-Leave (aka Immediate Leave) to reduce unnecessary
processing on each switch.
• Check the video resolution(s) being fed into the ALIF transmitters. If resolutions using
2048 horizontal pixels are unavoidable then ensure that Jumbo frames are enabled on
all switches.
• Check the forwarding mode on the switches. If Store and forward is being used, try
selecting Cut-through as this mode causes reduced latency on lesser switch designs.
• Ensure that one device within the subnet is correctly configured as an IGMP Querier,
usually a layer 3 switch or multicast router.
• Ensure that the firmware in every ALIF unit is version 2.1 or greater.
• Try adjusting the transmitter settings on each ALIF to make the output data stream as
efficient as possible. See ALIF transmitter video settings for details.
FURTHER
INFORMATION
OPERATION
continued
INDEX
Problem:The video image of the ALIF receiver shows horizontal lines across
the screen.
This issue is known as Blinding because the resulting video image looks as though you’re
viewing it through a venetian blind.
When video is transmitted by ALIF units, the various lines of each screen are divided up
and transmitted as separate data packets. If the reception of those packets is disturbed,
then blinding is caused. The lines are displayed in place of the missing video data packets.
There are several possible causes for the loss of data packets:
• Incorrect switch configuration. The problem could be caused by multicast flooding,
which causes unnecessary network traffic. This is what IGMP snooping is designed to
combat, however, there can be numerous causes of the flooding.
• Speed/memory bandwidth issues within one or more switches. The speed and
capabilities of different switch models varies greatly. If a switch cannot maintain pace
with the quantity of data being sent through it, then it will inevitably start dropping
packets.
• One or more ALIF units may be outputting Jumbo frames due to the video resolution
(2048 horizontal pixels) being used. If jumbo frames are output by an ALIF unit, but
the network switches have not been configured to use jumbo frames, the switches
will attempt to break the large packets down into standard packets. This process
introduces a certain latency and could be a cause for dropped packets.
• One or more ALIF units may be using an old firmware version. Firmware versions
prior to v2.1 exhibited an issue with the timing of IGMP join and leave commands that
caused multicast flooding in certain configurations.
INSTALLATION
APPENDIX D - Troubleshooting
42
Remedies:
• Ensure that the ALIF units and the A.I.M. server are located within the same subnet
because A.I.M. cannot cross subnet boundaries.
• Manually reset the ALIF units to their zero config IP addresses.
• Enable portfast on all switch ports that have ALIF units attached to them or try
temporarily disabling STP on the switches while A.I.M. is attempting to locate ALIF
units.
INSTALLATION
CONFIGURATION
Problem: A.I.M. cannot locate working ALIF units.
There are a few possible causes:
• The ALIF units must be reset back to their zero config IP addresses for A.I.M.
discovery. If you have a working network of ALIF’s without A.I.M. and then add A.I.M. to
the network A.I.M. will not discover the ALIFs until they are reset to the zero config IP
addresses.
• This could be caused by Layer 2 Cisco switches that have Spanning Tree Protocol
(STP) enabled but do not also have portfast enabled on the ports to which ALIF units
are connected. Without portfast enabled, ALIF units will all be assigned the same
zero config IP address at reboot and A.I.M. will only acquire them one at a time on a
random basis.
You can easily tell whether portfast is enabled on a switch that is running STP: When
you plug the link cable from a working ALIF unit into the switch port, check how long
it takes for the port indicator to change from orange to green. If it takes roughly one
second, portfast is on; if it takes roughly thirty seconds then portfast is disabled.
OPERATION
Remedies:
As per blinding discussed previously.
FURTHER
INFORMATION
Remedies:
• Linux PCs
Check the video settings on the PC. If the Dither video box option is enabled, disable
it.
• Apple Mac with Nvidia graphics
Use the Adder utility for Mac’s – Contact technical support.
• Apple Mac with ATI graphics
Enable the Magic Eye dither removal feature.
• Windows PCs
If you suspect these issues with PC’s, contact technical support for assistance.
• Replace old VGA adapters on host computers with DVI video cards.
Problem:The audio output of the ALIF receiver sounds like a scratched record.
This issue is called Audio crackle and is a symptom of the same problem that produces
blinding (see previous page). The issue is related to missing data packets.
INDEX
Problem:The mouse pointer of the ALIF receiver is slow or sluggish when
moved across the screen.
This issue is often related to either using dithering on the video output of one or more
transmitting computers or using VGA-to-DVI video converters.
Dithering is used to improve the perceived quality and color depth of images by diffusing
or altering the color of pixels between video frames. This practice is commonly used
on Apple Mac computers using ATI or Nvidia graphics cards.VGAto-DVI converters
unwittingly produce a similar issue by creating high levels of pixel background noise.
ALIF units attempt to considerably reduce network traffic by transmitting only the pixels
that change between successive video frames. When dithering is enabled and/or VGA-toDVI converters are used, this can have the effect of changing almost every pixel between
each frame, thus forcing the ALIF transmitter to send the whole of every frame: resulting
in greatly increased network traffic and what’s perceived as sluggish performance.
43
APPENDIX E - Glossary
IGMP Fast-Leave (aka Immediate Leave)
When a device/host no longer wishes to receive a
multicast transmission, it can issue an IGMP Leave Group
message as mentioned above. This causes the switch to
issue an IGMP Group-Specific Query message on the port
(that the Leave Group was received on) to check no other
receivers exist on that connection that wish to remain a
part of the multicast. This process has a cost in terms of
switch processor activity and time.
Where ALIF units are connected directly to the switch
(with no other devices on the same port) then enabling
IGMP Fast-Leave mode means that switches can
immediately remove receivers without going through
a full checking procedure. Where multiple units are
regularly joining and leaving multicasts, this can speed up
performance considerably.
INSTALLATION
Since its commercial introduction in 1980, the Ethernet
standard has been successfully extended and adapted to
keep pace with the ever improving capabilities of computer
systems. The achievable data rates, for instance, have risen
in ten-fold leaps from the original 10Mbit/s to a current
maximum of 100Gbit/s.
While data speeds have increased massively, the standard
defining the number of bytes (known as the Payload)
placed into each data packet has remained resolutely stuck
at its original level of 1500 bytes. This standard was set
during the original speed era (10Mbits/s) and offered the
best compromise at that speed between the time taken to
process each packet and the time required to resend faulty
packets due to transmission errors.
But now networks are much faster and files/data streams
are much larger; so time for a change? Unfortunately, a
wholesale change to the packet size is not straightforward
as it is a fundamental standard and changing it would mean
a loss of backward compatibility with older systems.
Larger payload options have been around for a while,
however, they have often been vendor specific and at
present they remain outside the official standard. There
is, however, increased consensus on an optional ‘Jumbo’
payload size of 9000 bytes and this is fully supported by
the AdderLink Infinity (ALIF) units.
Jumbo frames (or Jumbo packets) offer advantages for
ALIF units when transmitting certain high resolution video
signals across a network. This is because the increased data
in each packet reduces the number of packets that need to
be transferred and dealt with - thus reducing latency times.
The main problem is that for jumbo frames to be possible
on a network, all of the devices on the network must
support them.
CONFIGURATION
IGMP Querier
When IGMP is used, each subnet requires one Layer 3
switch to act as a Querier. In this lead role, the switch
periodically sends out IGMP Query messages and in
response all hosts report which multicast streams they
wish to receive. The Querier device and all snooping Layer
2 switches, then update their lists accordingly (the lists are
also updated when Join Group and Leave Group (IGMPv2)
messages are received).
Jumbo frames (Jumbo packets)
OPERATION
IGMP Snooping
The IGMP messages are effective but only operate at
layer 2 - intended for routers to determine whether
multicast data should enter a subnet. A relatively recent
development has taken place within the switches that
glue together all of the hosts within each subnet: IGMP
Snooping. IGMP snooping means these layer 2 devices now
have the ability to take a peek at the IGMP messages. As a
result, the switches can then determine exactly which of
their own hosts have requested to receive a multicast –
and only pass on multicast data to those hosts.
FURTHER
INFORMATION
Where an ALIF transmitter is required to stream video to
two or more receivers, multicasting is the method used.
Multicasting involves the delivery of identical data to
multiple receivers simultaneously without the need to
maintain individual links. When multicast data packets enter
a subnet, the natural reaction of the switches that bind
all the hosts together within the subnet, is to spread the
multicast data to all of their ports. This is referred to as
Multicast flooding and means that the hosts (or at least
their network interfaces) are required to process plenty of
data that they didn’t request. IGMP offers a partial solution.
The Internet Group Management Protocol (IGMP) is
designed to prevent multicast flooding by allowing Layer
3 switches to check whether host computers within
their care are interested in receiving particular multicast
transmissions.They can then direct multicast data only to
those points that require it and can shut off a multicast
stream if the subnet has no recipients.
There are currently three IGMP versions: 1, 2 and 3, with
each version building upon the capabilities of the previous
one:
• IGMPv1 allows host computers to opt into a multicast
transmission using a Join Group message, it is then
incumbent on the router to discover when they no
longer wish to receive; this is achieved by polling them
(see IGMP Querier below) until they no longer respond.
• IGMPv2 includes the means for hosts to opt out as well
as in, using a Leave Group message.
• IGMPv3 encompasses the abilities of versions 1 and 2
but also adds the ability for hosts to specify particular
sources of multicast data.
AdderLink Infinity units make use of IGMPv2 when
performing multicasts to ensure that no unnecessary
congestion is caused.
INDEX
Internet Group Management Protocol
44
CONFIGURATION
OPERATION
FURTHER
INFORMATION
INDEX
In order to build a robust network, it is necessary
to include certain levels of redundancy within the
interconnections between switches. This will help to
ensure that a failure of one link does not lead to a
complete failure of the whole network.
The danger of multiple links is that data packets, especially
multicast packets, become involved in continual loops as
neighbouring switches use the duplicated links to send and
resend them to each other.
To prevent such bridging loops from occurring, the
Spanning Tree Protocol (STP), operating at layer 2, is
used within each switch. STP encourages all switches
to communicate and learn about each other. It prevents
bridging loops by blocking newly discovered links until it
can discover the nature of the link: is it a new host or a
new switch?
The problem with this is that the discovery process can
take up to 50 seconds before the block is lifted, causing
problematic timeouts.
The answer to this issue is to enable the portfast variable
for all host links on a switch. This will cause any new
connection to go immediately into forwarding mode.
However, take particular care not to enable portfast on
any switch to switch connections as this will result in
bridging loops.
INSTALLATION
Spanning Tree Protocol (STP)
45
carries the data to another user; to complete the picture,
consider the transmission medium is Layer 0. In general,
think of the functions carried out by the layers at the top
as being complex, becoming less complex as you go lower
down.
As your data travel down from you towards the
transmission medium (the cable), they are successively
encapsulated at each layer within a new wrapper (along
with a few instructions), ready for transport. Once
transmission has been made to the intended destination,
the reverse occurs: Each wrapper is stripped away and the
instructions examined until finally only the original data are
left.
CONFIGURATION
When discussing network switches, the terms Layer 2 and
Layer 3 are very often used. These refer to parts of the
Open System Interconnection (OSI) model, a standardized
way to categorize the necessary functions of any standard
network.
There are seven layers in the OSI model and these define
the steps needed to get the data created by you (imagine
that you are Layer 8) reliably down onto the transmission
medium (the cable, optical fiber, radio wave, etc.) that
OPERATION
Layer 2 and Layer 3:The OSI model
So why are Layer 2 and Layer 3 of particular importance
when discussing AdderLink Infinity? Because the successful
transmission of data relies upon fast and reliable passage
through network switches – and most of these operate at
either Layer 2 or Layer 3.
The job of any network switch is to receive each incoming
network packet, strip away only the first few wrappers to
discover the intended destination then rewrap the packet
and send it in the correct direction.
In simplified terms, the wrapper that is added at Layer 2
(by the sending system) includes the physical address of
the intended recipient system, i.e. the unique MAC address
(for example, 09:f8:33:d7:66:12) that is assigned to every
networking device at manufacture. Deciphering recipients
at this level is more straightforward than at Layer 3, where
the address of the recipient is represented by a logical IP
address (e.g. 192.168.0.10) and requires greater knowledge
of the surrounding network structure. Due to their more
complex circuitry, Layer 3 switches are more expensive
than Layer 2 switches of a similar build quality and are
used more sparingly within installations.
FURTHER
INFORMATION
So which one to choose? The Cut-through method has the
least latency so is usually the best to use with AdderLink
Infinity units. However, if the network components and/
or cabling generate a lot of errors, the Store and forward
method should probably be used. On higher end store and
forward switches, latency is rarely an issue.
INDEX
In essence, the job of a layer 2 switch is to transfer as
fast as possible, data packets arriving at one port out to
another port as determined by the destination address.
This is known as data forwarding and most switches offer
a choice of methods to achieve this. Choosing the most
appropriate forwarding method can often have a sizeable
impact on the overall speed of switching:
• Store and forward is the original method and requires
the switch to save each entire data packet to buffer
memory, run an error check and then forward if no
error is found (or otherwise discard it).
• Cut-through was developed to address the latency
issues suffered by some store and forward switches.
The switch begins interpreting each data packet as it
arrives. Once the initial addressing information has been
read, the switch immediately begins forwarding the
data packet while the remainder is still arriving. Once
all of the packet has been received, an error check is
performed and, if necessary, the packet is tagged as
being in error. This checking ‘on-the-fly’ means that
cut-through switches cannot discard faulty packets
themselves. However, on receipt of the marked packet, a
host will carry out the discard process.
• Fragment-free is a hybrid of the above two methods.
It waits until the first 64 bits have been received before
beginning to forward each data packet. This way the
switch is more likely to locate and discard faulty packets
that are fragmented due to collisions with other data
packets.
• Adaptive switches automatically choose between the
above methods. Usually they start out as a cut-through
switches and change to store and forward or fragmentfree methods if large number of errors or collisions are
detected.
INSTALLATION
Forwarding modes
46
APPENDIX F - Configuration menus (via VNC)
When viewing remotely via VNC, the unit has a main configuration menu through which
you can access various sub menus to configure particular items.
OPERATION
FURTHER
INFORMATION
INDEX
The various configuration pages are covered within this appendix:
• User accounts
• Gui edit configuration
• Unit configuration
• Advanced unit configuration
• Time & date configuration
• Network configuration
• Serial port configuration
• Host configuration
• Power switching configuration
• Logging and status
CONFIGURATION
INSTALLATION
To view the main configuration menu
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner. The main configuration menu will
be displayed:
47
Up to 16 users can be created by the admin user, each with their password. One of the
16 users can be the admin user. This user has access to the units configuration menu.
Ticking the ‘IsAdmin’ box creates the Admin user. The admin user can also determine
whether the users are allowed access to the power control menu in order to turn
servers on and off.
User Name
All user names must consist of lower case characters or numbers only. No symbols
or upper case characters are permissible. The user name can be between 1 and 32
characters in length but cannot contain foreign characters.
INSTALLATION
User accounts
Menu Bar
Optionally click to customize the menu bar for each user. See next page.
Enable Password Hashing
This enables the storing of passwords in an encrypted format, which provides added
security.
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘User Accounts’ option.
OPERATION
Power
When ticked, the selected user will be permitted to control the power input to host
systems (requires optional power control switch unit(s) to be fitted).
FURTHER
INFORMATION
Remote
When ticked, the selected user can gain access via an IP network link (such as a local
intranet or the wider Internet, depending on how the ALIF 2112T is connected) and/or
Console Server access.
INDEX
Local
This column is greyed out as this feature is not available on ALIF 2112T.
CONFIGURATION
Password
Each password can be between 1 and 16 characters in length. A suitable password is best
constructed using a mixture of more than 6 letters, numbers and punctuation characters.
48
Gui edit configuration
To edit the menu bar locally
1 Login remotely via VNC viewer and display the viewer window.
2 Place the mouse pointer on the menu bar and click the right mouse button. A popup
will be displayed:
INDEX
To globally edit the menu bar via admin
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click on User Configuration
4 Click on the relevant Edit button.
FURTHER
INFORMATION
OPERATION
3 Click on any option within the popup to add it to or remove it from the menu bar.
4 When all changes have been made, click anywhere else within the viewer window.
Changes made in this way will affect the individual user only.
CONFIGURATION
INSTALLATION
If required, you can customize the menu bar of the viewer window to ensure that it
contains only the necessary options.
The menu bar can be edited locally by each user or edited singly by the admin or
alternatively, the admin can globally alter the menu bar for all users.
49
New Connections Private
Allows you to determine whether new local or VNC connections should be set up as
private (when ticked) or as shared (when unticked).
Menu Bar Toggle Hot Key
Determines the function key that can be used to display/hide the menu bar within the
VNC screen.
Encryption
Four options are available: Always On, Prefer Off, Prefer On, or Maximum. The one
to choose depends on the specific details of your installation. The use of encryption
imposes a slight performance overhead of roughly 10% but is highly secure against third
party intrusion. Maximum selects 256 bit encryption.
Firmware Version
Indicates the version of the internal software within the ALIF 2112T flash memory. This
may be updated using the flash upgrade procedure.
Host Keyboard Layout
Use the arrow buttons to match the keyboard layout expected by the host system.
Admin (Change) Password
Click this button to enter/edit the password that will be used to gain administrator
access to the ALIF 2112T.
Number of simultaneous VNC Users
Allows you to restrict the number of concurrent VNC sessions. The maximum number is
16 and the default is 4.
VNC Viewer Hot Key Sequence
When using the VNC Viewer, you can use key press combinations to select host
computers and also to display the host selection menu. This option allows you to choose
which keys should be used to form the hotkeys that will precede a switching command.
The default setting is CTRL + ALT, so as an example when you press the CTRL ALT and
2 keys, the viewer will change to the host with “Hotkey Host Number” 2 - see Host
configuration.
Advanced Unit Configuration
FURTHER
INFORMATION
Hardware Version
Indicates the version of the electronic circuitry within the ALIF 2112T unit.
CONFIGURATION
Unit Name
The name entered here will be displayed on the local menus and the remote VNC
viewer/browser windows.
OPERATION
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Unit Configuration’ option.
INDEX
This page provides access to a selection of both basic and advanced settings for the ALIF
2112T. Many of the settings displayed here are also accessible through the on-screen
menu.
INSTALLATION
Unit configuration
50
Mouse Rate
Defines the rate at which mouse movement data are transmitted to the system.The default
option is 20ms, which equates to 50 mouse events per second.This is used to slow down the
rate in exceptional circumstances but normally requires no adjustment.
Idle Timeout
Determines the period of inactivity on a global connection before the user is logged out.The
idle timeout period can be set to any time span, expressed in minutes.
Session Sleep Timeout
Determines the period of inactivity before the viewer screen will blank and a message
is displayed. When no hosts are being viewed either because of this time out or if no
viewers are active then parts of the video circuitry are powered down reducing power
consumption by up to a third.
Protocol Timeout
Sets the time period by which responses should have been received to outgoing data
packets. If the stated period is exceeded, then a connection is considered lost and
terminated.
Use Quick Mouse Calibration
Invokes colord calibration techniques that handle the majority of mouse types.
Behaviour for admin connections when limit reached
Determines what should occur when the limit on VNC users is reached. Options are:
Replace oldest connection, Replace newest connection and Don’t replace. Only non-administrator
connections can be terminated in this way.
FURTHER
INFORMATION
Force VNC Protocol 3.3
IMPORTANT: Protocol 3.3 is a legacy version that does not offer any encryption. Hashed
passwords are not supported with 3.3
Single Mouse Mode Mouse Switch
Select the mouse button combination to exit from single mouse mode (when active).
CONFIGURATION
Mouse Latency Allowance
This option is used during calibration to account for latency delays that may be caused as
signals pass through a device.
During calibration, the ALIF 2112T waits for 40ms after each mouse movement before
sampling the next. If a device adds a significant delay to the flow of data, the calibration
process can be lengthened or may fail entirely. The value entered here is added to (or
subtracted from) the default 40ms sampling time.
Note: You can enter negative values (down to -40) in order to speed up the
calibration process when using fast KVM switches. Use this option with caution as it
can adversely affect the calibration process.
OPERATION
Background Refresh Rate
Use the arrow keys to alter the background refresh rate used to correct any screen
changes missed in normal operation. The options are: Slow, Medium, Fast, Auto or
Disabled. The Auto option automatically varies the refresh rate when multiple VNC
sessions are active to provide a balance between the sessions.
Note:When a low connection speed is detected, the background refresh is automatically
disabled, regardless of the settings of this option.
Enable Virtual Media
When ticked, allows the Adder Virtual Media features to be used.
Reset Unit
Performs a complete cold boot of the ALIF 2112T unit.
INDEX
Click this button to display advanced options that do not normally require alteration.
INSTALLATION
Advanced unit configuration
51
The dst string and [offset] specify the name and offset for the corresponding Daylight
Saving Time zone; if the offset is omitted, it defaults to one hour ahead of standard time.
The remainder of the specification describes when Daylight Saving Time is in effect. The
start field is when Daylight Saving Time goes into effect and the end field is when the
change is made back to standard time. The most common format used for the daylight
saving time is: Mm.w.d
Where: m specifies the month and must be between 1 and 12. The day d must be
between 0 (Sunday) and 6. The week w must be between 1 and 5; week 1 is the first
week in which day d occurs, and week 5 specifies the last d day in the month.
Use NTP
When this option is selected, the ALIF 2112T will synchronize its internal clocks using
information from the (Network Time Protocol) server listed in the NTP Server IP address
field.
NTP Server IP address
Optionally enter the IP address for a known Network Time Protocol server.
Set Time from NTP Server
Click to immediately use the time and date information from the listed NTP server.
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Time & Date Configuration’ option.
The time fields specify when, in the local time currently in effect, the change to the other
time occurs. If omitted, the default is 02:00:00.
Typical examples are:
UK: GMT0BST,M3.5.0/1,M10.5.0/2
Central Europe: CET-1CEST,M3.5.0/2,M10.5.0/3
US Eastern: EST5EDT,M3.2.0/2,M11.1.0/2
US Pacific: PST5PDT,M3.2.0/2,M11.1.0/2
For further details
• For details of timezone specifier formats, please refer to:
http://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html
• For details of the Network Time Protocol (main RFC number: 1305; the SNTP subset
used as the basis for the ALIF 2112T: 4330)
http://www.ietf.org/rfc.html
INSTALLATION
or EST and 5, respectively.
CONFIGURATION
std offset dst [offset],start[/time],end[/time]
The std and offset specify the standard time zone, such as GMT and 0, or CET and -1,
OPERATION
Timezone specifier
Optionally enter a recognized timezone specifier related to the current position of the
ALIF 2112T unit. When an NTP server is used, the specifier will be used to provide the
correct real time.
The timezone specifier takes the following form:
FURTHER
INFORMATION
This page allows you to configure all aspects relating to time and date within the unit.
INDEX
Time & date configuration
52
VNC Port
This is the logical link through which communications with a remote VNC viewer will be
channelled. The default setting is 5900 which is a widely recognized port number for use
by VNC software. However, in certain circumstances it may be advantageous to alter this
number - see ‘Security issues with ports’ for more details.
MAC address
Media Access Control address – this is the unique and unchangeable code that was
hard coded within your ALIF 2112T unit when it was built. It consists of six 2-digit
hexadecimal (base 16) numbers separated by colons. A section of the MAC address
identifies the manufacturer, while the remainder is effectively the unique electronic serial
number of your particular unit.
IP Address
This is the identity of the ALIF 2112T within a network. The IP address can be thought of
as the telephone number of the ALIF 2112T. Unlike the MAC address, the IP address can
be altered to suit the network to which it is connected. It can either be entered manually
or configured automatically using the DHCP option. When the DHCP option is enabled,
this entry is grayed out.
HTTP Port
This is the logical link through which communications with a remote web browser
will be channelled. The default setting of 80 is an established standard for web (HTTP
– HyperText Transfer Protocol) traffic though this can be changed to suit your local
network requirements.
IP Access Control
This section allows you to optionally specify ranges of addresses which will or won’t
be granted access to the ALIF 2112T. If this option is left unchanged, then the default
entry of ‘+0.0.0.0/0.0.0.0’ ensures that access from all IP addresses will be permitted. See
Setting IP access control for details.
CONFIGURATION
IP Gateway
This is the address of the device that links the local network (to which the ALIF 2112T
is connected) to another network such as the wider Internet. Usually the actual gateway
is a network router and it will be used whenever a required address lies outside the
current network.
OPERATION
IP Network Mask
Also often called the subnet-mask, this value is used alongside the IP address to help
define a smaller collection (or subnet) of devices on a network. In this way a distinction
is made between locally connected devices and ones that are reachable elsewhere, such
as on the wider Internet. This process helps to reduce overall traffic on the network and
hence speed up connections in general.
FURTHER
INFORMATION
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Network Configuration’ option.
INDEX
This page allows you to configure the various aspects of the IP port.
INSTALLATION
Network configuration
53
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Network Configuration’ option.
INSTALLATION
Mask
Enter an IP network mask that
indicates the range of addresses
that are to be allowed or denied
access. For instance, if only a
single specified IP address were
to be required, the mask entry
would be 255.255.255.255 in
order to specify a single location.
Access
Use the arrow buttons
to select either ‘Allow’ or
‘Deny’ as appropriate.
CONFIGURATION
Network/Address
Enter the network address
that is to be allowed or denied
access. If a range of addresses is
being specified then specify any
one of the addresses within the
range and use the Mask entry to
indicate the size of the range.
2 Enter the base network address, the mask and select the appropriate access setting.
3 Click the OK button.
To reorder access control entries
IMPORTANT:When reordering, ensure that any specific allowed addresses are listed higher in
the list than any denied addresses.Take care not to invoke any deny access settings that would
exclude valid users.
1 In the access control list, click on the entry to be moved.
2 Click the Up or Down buttons as appropriate.
To edit/remove access control entries
1 In the access control list, click on the appropriate entry.
2 Click either the Edit or Remove button as appropriate.
OPERATION
In the list, access control addresses prefixed by ‘+’ are allow entries while those prefixed
by ‘– ‘ are deny entries.
To define a new IP access control entry
1 Click the Add button to display a popup dialog:
FURTHER
INFORMATION
The golden rule with this feature is ‘Include before you exclude’ or to put it another way
‘Arrange allowed addresses in the list before the denied addresses’.
This is because the positions of entries in the list are vitally important. Once a range of
addresses is denied access, it is not possible to make exceptions for particular addresses
within that range. For instance, if the range of addresses from A to F are denied access
first, then the address C could not be granted access lower down the list. Address C
needs to be placed in the list before the denied range.
IMPORTANT:This feature should be configured with extreme caution as it is possible to deny
access to everyone. If such an error occurs, you will need to perform a reset to factory default
settings in order to regain access.
INDEX
Setting IP access control
54
Serial port configuration
INDEX
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Serial port Configuration’ option.
FURTHER
INFORMATION
OPERATION
CONFIGURATION
Baud Rate
Determines the communication speed of the OPTIONS port. The other communication
settings are fixed as: No parity, 8 bit word, 1 stop bit.
INSTALLATION
This page allows you to configure the baud rate of the ALIF 2112T serial port that is
used to control power switch devices. A full range of standard baud rates are available.
55
Host configuration
To create a new host entry
1 Click one of the host entries to reveal a Host configuration dialog.
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Host Configuration’ option.
OPERATION
FURTHER
INFORMATION
Erase Host Configuration
Removes all hosts from the list.
INDEX
Sort
Allows you to reorder the list of hosts either alphabetically or by entry number.
Name
Enter the name that will be displayed in the viewer window when you click the Host
button.
Users
Select the users that will be permitted to connect to this host. Either enter * to allow
all users or a list of users separated by commas.
KVM Switch Macro
Declare the hot key sequence that will cause the KVM switch to link with the required
host system. See Appendix L - Hotkey sequences for details.
Hotkey Host Number
Declare the numeric sequence that is pressed together with the VNC viewer hotkeys
(usually Ctrl + Alt) to select this host system, which is the same value as the KVM port
number.
Power On
Enter the code required to make an attached power control unit apply power to the
host. See Power switching configuration for details.
Power Off
Enter the code required to make an attached power control unit remove power from
the selected host.
Reboot
Enter the code required to make an attached power control unit remove power and
then re-apply it a few seconds later.
2 Enter the required information in each field.
3 Click the OK button.
CONFIGURATION
INSTALLATION
This page provides the opportunity to configure various details for each of the host
systems that may be connected to the ALIF 2112T. Each entry can be configured with
a name, the permitted users, the hot key combinations required to switch to it and, if
required, appropriate power control commands.
56
Where:
x is the switch box number,
y is the power port number,
z is ‘0’ for OFF or ‘1’ for ON
r is for Reboot, and
\0D represents Enter (or Carriage return).
Example 1
To switch ON port 5 of switch box 2, the code would be as follows:
• Power sequence: P25=1\0D
Example 2
To switch OFF port 8 of switch box 3, the code would be as follows:
• Power sequence: P38=0\0D
For details about operating this feature, see Power switching control within the
Configuration chapter.
6 Enter the Power control sequences in the Power On, Power Off and Reboot fields 
7 Click OK to close the dialog and then click the Save button in the main Host
Configuration window to store the details.
To control two or more ports simultaneously
You can control up to four power ports using a single sequence. This is done using
the same command structure as shown above, plus a delay command, for each port.
Immediately following a port command, insert the characters ‘\*’ before the next port
command, and so on up to four ports. For instance, to switch on ports 1 and 2 in the
first power switch, the command line would be:
P11=1\0D\*P12=1\0D
CONFIGURATION
/Pxy=z\0D
INSTALLATION
Notes:The settings given below are for Adder power switches model numbers PSU-8SLAVE and
PSU-1GUARD - other power switches may require different settings. Please refer to your power
switch documentation for details about codes required by other power switches.
The structure of each power sequence (OFF, ON or Reboot) is as follows:
OPERATION
To configure the power sequences for each host computer
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Host configuration’ option.
4 Click a host entry to display a Host configuration dialog:
5 If necessary, configure other parameters (Name, Users, Hot Keys - MORE).
Power control sequences
FURTHER
INFORMATION
Power switch configuration comprises two main steps:
• Configure the OPTIONS serial port to the same speed as used by the power switch
box(es), using the Serial port configuration menu.
• Configure power ON and OFF strings for each relevant host computer.
For each power port there needs to be a valid ‘Power ON string’ and similarly an
appropriate ‘Power OFF string’. In each case, the strings are a short sequence of
characters that combine a port address and a power on or off value.
If a particular computer has more than one power input (and thus requires an equivalent
number of power ports to control them), collections of strings can be combined to
switch all of the required ports together as a group.
INDEX
Power switching configuration
57
Date and
time the
event
occurred
Type of event, user name and access
method or remote IP address
To copy and paste the log
You can copy the information listed within the log and paste it into another application.
1 While viewing the log screen, press Ctrl and C, to copy the data into the clipboard.
2 In a text application (i.e. Word, WordPad, Notepad) press Ctrl and V, or right mouse
click and ‘Paste’.
Syslog Server IP Address
Logging information can optionally be sent, as it occurs, to a separate system using the
standard Syslog protocol. Enter the IP address of a suitable system in the field provided.
Click to clear
all log entries
Click to
refresh
the list
Optionally enter an
IP address to which
the status log should
be sent
Click to
return to
the main
menu
INDEX
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Logging and Status’ option.
FURTHER
INFORMATION
OPERATION
For further details
• For details of the Syslog protocol (RFC number: 3164)
http://www.ietf.org/rfc.html
CONFIGURATION
This screen provides various details about the user activity on the ALIF 2112T unit.
INSTALLATION
Logging and status
58
APPENDIX G - VNC viewer connection options
You can also reduce the four standard tabs to just one that contains only the most
commonly used options by clicking the Basic... button in the lower left corner. The
resulting page includes all of the Display items shown opposite plus the Connection
options shown below:
Connection
View-only
When ticked, no control data (from keyboard or mouse) are sent to the ALIF 2112T.
Pass special keys directly to server
When ticked, ‘special’ keys (the Windows key, the Print Screen key, Alt+Tab, Alt+Escape
and Ctrl+Escape) are passed directly to the ALIF 2112T rather than being interpreted
locally.
Menu key
This feature allows you to select which function key is used to display the VNC viewer
options menu. The menu key is the only way to exit from the full screen viewer mode.
Note: If you make any changes to the options given here and wish to retain them for successive
connection sessions, ensure that the option ‘Use these settings for all new connections’ is ticked.
INSTALLATION
No Scaling
No attempt is made to make the screen
image fit the viewer window.You may need
to scroll horizontally and/or vertically to
view all parts of the screen image.
Custom Size
Adjusts the server screen image according
to the Width and Height settings in the
adjacent fields. A drop box to the right of
the fields allows you to define the image
size by percentage or by pixels, as required.
Preserve Aspect Ratio
When ticked, maintains a consistent
ratio between the horizontal and vertical
dimensions of the screen image.
Other options
CONFIGURATION
Scale to Window Size
Adjusts the server screen image to suit the
size of the viewer window.
OPERATION
There are four tabbed pages of options:
• Display
• Inputs
• Connection
• Expert
Scaling
Full screen mode
When ticked, opens the VNC Viewer in full screen mode.
Enable toolbar
When ticked, the VNC toolbar will be displayed whenever you hover your mouse near
the top centre of the VNC window.
Adapt to network speed
When ticked,VNC will automatically adjust the image quality to suit the connection
speed. When unticked, a slider allows you to choose the balance manually.
Always use best available colour quality (not in V5 viewers)
When ticked, the VNC Viewer will aim to maximize performance while still maintaining
a full color display (even on slower network connections) by affecting other aspects of
operation. For instance, by reducing the amount of information sent about the mouse
cursor position (which may make the mouse cursor movements appear jerky).
FURTHER
INFORMATION
Click here to access the options
Display
INDEX
Note: If you are using a later version of VNC viewer than that provided with the product
originally, some menus may differ slightly from those shown here.
When you are connecting to the ALIF
2112T using the VNC viewer, a number of
options are available.
59
Inputs
Enable mouse input
Allows mouse data to be transferred to
the ALIF 2112T.
Enable 3-button mouse emulation
This feature allows you to use a 2-button mouse to emulate the middle button of a
3-button mouse. When enabled, press the left and right mouse buttons simultaneously to
create a middle button action.You are advised to generally use a 3-button mouse.
Rate-limit mouse move events
When ticked, this feature reduces the mouse movement information that is sent to the
ALIF 2112T and host system. This is useful for slow connections and you will notice that
the remote cursor will catch up with the local cursor roughly once every second.
INSTALLATION
CONFIGURATION
Menu key
This feature allows you to select which function key is used to display the VNC viewer
options menu. The menu key is the only way to exit from the full screen viewer mode.
OPERATION
Pass special keys directly to server
When ticked, ‘special’ keys (the Windows
key, the Print Screen key, Alt+Tab,
Alt+Escape and Ctrl+Escape) are passed
directly to the ALIF 2112T rather than
being interpreted locally.
Enable file transfer
This permits the “file transfer” method of Virtual Media (see Virtual Media).
FURTHER
INFORMATION
Enable keyboard input
Allows keyboard data to be transferred to
the ALIF 2112T.
Share clipboard with server
This permits the “Paste Clipboard” operation (see Keyboard control), and the “Create
VM Drive” feature of Virtual Media (see Virtual Media).
INDEX
Inputs:
When set to ‘Enabled’, all primary options
below are ticked. The ‘Disabled’ setting
unticks all of the primary options (causing
‘view-only mode’ where no control
data may be sent to the ALIF 2112T. The
‘Custom’ setting is shown if you choose
your own combination of options.
60
Expert
OPERATION
CONFIGURATION
INSTALLATION
The options within this section work
correctly with ALIF 2112T in their default
states and should not require alteration
except in special circumstances.
FURTHER
INFORMATION
The options on this page are not relevant
to ALIF 2112T connections and should be
left in their default states.
INDEX
Connection
61
APPENDIX H - VNC viewer window options
Refresh Screen
Requests data from the server for a complete redraw of the
screen image, not just the items that change.
Virtual Media...
Allows files to be transferred from the remote computer to the
host. See Virtual Media for details.
Send Files to Server...
Allows files to be transferred from the remote computer to the
host. See Virtual Media for details.
New connection...
Displays the connection dialog so that you can log on to a
different ALIF 2112T or VNC server location.
Options...
Displays the full range of connection options - see Appendix G
for more details.
Connection info...
Displays various connection and display details.
About...
Displays information about your VNC viewer.
CONFIGURATION
OPERATION
Ctrl, Alt, Send F8, Send Ctrl-Alt-Del
Sends the selected keypress(es) to the ALIF 2112T and host
computer. This is necessary because certain keys and key
combinations are trapped by the VNC viewer.
FURTHER
INFORMATION
Single mouse mode (P)
Used for fast network connections where a second, “predictor”
cursor is not required.
INDEX
Standard window control items
Full screen
Expands the VNC viewer window to fill the whole screen with no
visible window edges or toolbar. Press F8 to re-display this menu.
INSTALLATION
Click the VNC icon in the top left corner of the viewer window (or press F8) to display
the window options:
62
Encoding and colour level
Auto select
When ticked, this option will examine the speed of your connection to the ALIF 2112T
and apply the most suitable encoding method. This option is suggested for the majority of
installations.
Preferred encoding
There are three manually selectable encoding methods
which are accessible when the Auto select option is
unticked.
• ZRLE – This is a highly compressed method that is
best suited to slow modem connections.
• Hextile – This method offers better performance
than the ZRLE when used over a high speed
network because there is no need for the ALIF
2112T to spend time highly compressing the data.
• Raw – This is a primitive, uncompressed method that is mainly used for technical
support issues.You are recommended not to use this method.
Colour level
The color level is fixed at Medium (256 colors) for almost all browsers.
Send clipboard to server
This feature is restricted to software server versions
of VNC and has no effect on ALIF 2112T installations.
Security
512 bits (low security)
Selects the lowest level of encoding for
communications between the browser and the ALIF
2112T.
1024 bits (medium security)
Selects the middle level of encoding for
communications between the browser and the ALIF
2112T.
2048 bits (high security)
Selects the highest level of encoding for
communications between the browser and the ALIF
2112T.
Misc
Shared (don’t disconnect other viewers)
This feature is restricted to software server versions
of VNC and has no effect on ALIF 2112T installations.
Render cursor locally
This feature is restricted to software server versions
of VNC and has no effect on ALIF 2112T installations.
Fast CopyRect
This option should remain enabled.
INSTALLATION
Accept clipboard from server
This feature is restricted to software server versions
of VNC and has no effect on ALIF 2112T installations.
CONFIGURATION
There are four options pages:
View only (ignore mouse & keyboard)
When ticked, the viewer will not send keyboard
or mouse information to the ALIF 2112T or host
computer.
OPERATION
Click here to
access the options
Inputs
FURTHER
INFORMATION
When you are connecting to the ALIF 2112T using the Java viewer, a number of options
are available.
INDEX
APPENDIX I - Java viewer options
63
CONFIGURATION
OPERATION
FURTHER
INFORMATION
INDEX
Particularly useful for complex ALIF 2112T configurations and the control of remote
installations, KVMADMIN is a powerful administration tool.
KVMADMIN is based upon the established VNC viewer and uses the same security
system. Rather than a graphical interface such as the standard viewer, KVMADMIN uses
command line control to provide the following administration facilities:
• Discover and adjust the ALIF 2112T configuration, including host systems,
• Save and restore the ALIF 2112T configuration,
• Set user names and passwords,
• Download the event log,
The use of KVMADMIN is strictly limited to the ‘admin’ user and for security purposes it
is not possible to retrieve user names or passwords from the ALIF 2112T.
To use KVMADMIN you require the IP address and admin password of the ALIF 2112T
unit. The command line is as follows:
kvmadmin <command> <ip address> [<parameters>]
where <command> is one of the following:
• -setconfig <config-file>
• -getconfig <config-file>
• -setusers <csv-file>
• -getlog <log-file>
• -gethosts <csv-file>
• -sethosts <csv-file>
• -setmodes <csv-file>
For instance, the command line:
kvmadmin -getconfig kvm1.cfg 192.168.2.1
... downloads the current configuration from the ALIF 2112T unit at the given address
and stores it in the local file kvm1.cfg.
Whereas the command line:
kvmadmin -setusers users.csv 192.168.2.1
... configures the usernames and passwords for the same unit from the local file users.csv.
For more information about KVMADMIN, please refer to the user notes supplied with
the utility.
INSTALLATION
APPENDIX J - The KVMADMIN utility
64
CONFIGURATION
OPERATION
FURTHER
INFORMATION
INDEX
640x480 @ 60Hz
720x480 @ 60Hz
768x576 @ 60Hz
800x480 @ 60Hz
1024x600 @ 60Hz
1024x768 @ 60Hz
1152x768 @ 60Hz
1152x864 @ 60Hz
1280x720 @ 60Hz
1280x768 @ 60Hz
1280x800 @ 60Hz
1280x854 @ 60Hz
1280x960 @ 60Hz
1280x1024 @ 60Hz
1366x768 @ 60Hz
1400x1050 @ 60Hz
1440x900 @ 60Hz
1440x960 @ 60Hz
1600x900 @ 60Hz
1600x1200 @ 60Hz
1680x1050 @ 60Hz
1920x1080 @ 60Hz
1920x1200 @ 60Hz
2048x768 @ 60Hz
2048x1080 @ 60Hz
2048x1152 @ 60Hz
2048x1536 @ 60Hz
2048x2048 @ 60Hz
2560x1440 @ 60Hz
2560x1600 @ 60Hz
2560x2048 @ 50Hz
INSTALLATION
APPENDIX K - Known working video modes
65
APPENDIX L - Hotkey sequences
ALIF 2112T allows you to enter commands suitable for any KVM switch in order to choose
from up to 128 host systems.These switching commands can take the form of hotkey
sequences that emulate standard keypress combinations.
Examples
To send the command Ctrl + Alt 4 you should use the following: +Ctrl+Alt+4.
To send the command Ctrl + Alt 12 you should use the following: +Ctrl+ALT+–1+2
(the ‘+–1’ entry causes the 1 key to be pressed and released before the 2 key is pressed).
To send the command Scroll lock 1 + Enter (with a 500ms delay) you should use the
following: +–Scr*500+1+Ent
Main control keys (see ‘Using abbreviations’)
Backspace | Tab | Return | Enter | Ctrl | Alt | Win | Shift | LShift | RShift
LCtrl | RCtrl | LAlt | AltGr | RAlt | LWin | RWin | Menu | Escape | Space
CapsLock | NumLock | PrintScreen | Scrolllock
Math operand keys (see ‘Using abbreviations’)
Add (Plus) | Subtract (Minus) | Multiply
INSTALLATION
Function keys
Creating macro sequences
Hot key macro sequences can be up to 256 characters long. All keys are assumed to be
released at the end of a line, however, you can also determine that a key is pressed and
released within a sequence. Any of the following three examples will send a command
that emulates and a press and release of the Scroll Lock key:
+SCROLL-SCROLL
+-SCROLL
+SCROLLExample:
+-SCROLL+-SCROLL+1+ENTER
Press and release scroll twice, press 1 then enter then release all keys (equivalent
definition is +SCROLL-SCROLL+SCROLL-SCROLL+1+ENTER-1-ENTER)
Using abbreviations
To reduce the length of the key definitions, any unique abbreviation for a key can be
used. For example: “scroll”, “scr” and even “sc” all provide an identifiable match for
“ScrollLock” whereas “en” could not be used because it might mean “Enter” or “End”
(“ent” would be suitable for “Enter”).
Note: Hotkey sequences and abbreviations are not case sensitive.
For information about where to enter these codes, please see the sections Host
configuration or Keyboard control.
CONFIGURATION
F1 | F2 | F3 | F4 | F5 | F6 | F7 | F8 | F9 | F10 | F11 | F12
OPERATION
Notes
• The entries are not case sensitive.
• All characters can be entered using their ASCII codes, from 32 to 126 (i.e. A,B,C, … 1,2,3
etc.) with the exception of the special characters above.
• It is not necessary to specify all keys to be released at the end because they are all released
automatically after the last code.
• A number of KVM switches from alternative manufacturers use hot key sequences that begin
with a press/release of either the Scroll Lock or Ctrl keys.These often require a delay between
the initial key press and the channel number to allow the switch to respond. A 500ms delay is
usually sufficient.
KP_Insert | KP_Delete | KP_Home | KP_End | KP_PageUp
KP_PageDown | KP_Up | KP_Down | KP_Left | KP_Right | KP_Enter
KP_Add | KP_Subtract | KP_Divide | KP_Multiply
KP_0 to KP_9
FURTHER
INFORMATION
Almost any combination of keypresses can be emulated using the following notations:
+ means press down the key that follows;
– means release the key that follows
+–means press and then release the key that follows
* means add a delay. The standard delay period is 250ms, however, if a number
immediately follows the asterisk, this will define an alternate delay period (in
milliseconds)
Keypad keys (see ‘Using abbreviations’)
INDEX
Hotkey sequences
Central control keys (see ‘Using abbreviations’)
Insert | Delete | Home | End | PageUp | PageDown
Up | Down | Left | Right | Print | Pause
66
APPENDIX M - Cable pinouts, video modes and general specifications
ALIF dual units support all VESA and CEA video modes.
INSTALLATION
198mm (7.92”) x 44mm (1.76”) x 145mm (5.7”)
1U compact case, robust metal design
1.11kg (2.44lbs)
Rack mount - single or dual units per 1U slot.
VESA monitor / wall mount chassis.
100-240VAC 50/60Hz, 0.8A,
5VDC 20W
0ºC to 40ºC (32ºF to 104ºF)
CE, FCC
CONFIGURATION
Casing (w x h x d): Construction: Weight: Mount kits: Power to adapter: Power to unit:
Operating temp: Approvals: OPERATION
Supported video modes
9pin D-type
female
FURTHER
INFORMATION
9pin D-type
female
General specifications
INDEX
RS232 ‘null-modem’ cable pin-out
67
APPENDIX N - Fiber modules and cables
OM2
(50/125)
OM3
(50/125)
OM4
(50/125)
OS1 and OS2
(9/125)
Multimode
(TIA-492AAAA)
Multimode
(TIA-492AAAB)
Multimode
(850 nm Laser-optimized)
(TIA-492AAAC)
Multimode
(850 nm Laser-optimized)
(TIA-492AAAC)
Single-mode
(TIA-492C000 / TIA-492E000)
Distance Adder part
at
number for
1Gbps
SFP module
Bar
color
Conn.
type
220m
SFP-MM-LC
Black
LC
Normal
Applications
Orange
Military
Applications
Slate
Suggested Print
Nomenclature
62.5/125
Orange
Orange
50/125
550m
“
“
“
Aqua
Undefined
850 LO 50 /125
550m
“
“
“
Aqua
Undefined
850 LO 50 /125
550m
“
“
“
Yellow
Yellow
SM/NZDS, SM
10Km
SFP-SM-LC
Blue
LC
CONFIGURATION
(62.5/125)
Coding
OPERATION
OM1
Fiber Type
FURTHER
INFORMATION
Fiber size
INDEX
Fiber Type
INSTALLATION
To suit your installation layout, two fiber modules are available for the ALIF dual units
to suit various fiber optic cables. The specifications for all are summarized in the table
below:
68
CONFIGURATION
Adder Technology Ltd warrants that this product shall be free from defects in
workmanship and materials for a period of two years from the date of original purchase.
If the product should fail to operate correctly in normal use during the warranty period,
Adder will replace or repair it free of charge. No liability can be accepted for damage due
to misuse or circumstances outside Adder’s control. Also Adder will not be responsible
for any loss, damage or injury arising directly or indirectly from the use of this product.
Adder’s total liability under the terms of this warranty shall in all circumstances be
limited to the replacement value of this product.
If any difficulty is experienced in the installation or use of this product that you are
unable to resolve, please contact your supplier.
INSTALLATION
WARRANTY
OPERATION
For use in dry, oil free indoor environments only.
Warning - live parts contained within power adapter.
No user serviceable parts within power adapter - do not dismantle.
Plug the power adapter into a socket outlet close to the module that it is powering.
Replace the power adapter with a manufacturer approved type only.
Do not use the power adapter if the power adapter case becomes damaged, cracked
or broken or if you suspect that it is not operating properly.
• If you use a power extension cord with the units, make sure the total ampere rating of
the devices plugged into the extension cord does not exceed the cord’s ampere rating.
Also, make sure that the total ampere rating of all the devices plugged into the wall
outlet does not exceed the wall outlet’s ampere rating.
• Do not attempt to service the units yourself.
FURTHER
INFORMATION
•
•
•
•
•
•
INDEX
SAFETY INFORMATION
69
FCC Compliance Statement (United States)
This equipment generates, uses and can radiate radio frequency energy and if not
installed and used properly, that is, in strict accordance with the manufacturer’s
instructions, may cause interference to radio communication. It has been tested and
found to comply with the limits for a class A computing device in accordance with
the specifications in Subpart J of part 15 of FCC rules, which are designed to provide
reasonable protection against such interference when the equipment is operated in a
commercial environment. Operation of this equipment in a residential area may cause
interference, in which case the user at his own expense will be required to take whatever
measures may be necessary to correct the interference. Changes or modifications not
expressly approved by the manufacturer could void the user’s authority to operate the
equipment.
CONFIGURATION
This equipment has been tested and found to comply with the limits for a class A
computing device in accordance with the specifications in the European standard
EN55022. These limits are designed to provide reasonable protection against harmful
interference. This equipment generates, uses and can radiate radio frequency energy
and if not installed and used in accordance with the instructions may cause harmful
interference to radio or television reception. However, there is no guarantee that
harmful interference will not occur in a particular installation. If this equipment does
cause interference to radio or television reception, which can be determined by turning
the equipment on and off, the user is encouraged to correct the interference with one
or more of the following measures: (a) Reorient or relocate the receiving antenna.
(b) Increase the separation between the equipment and the receiver. (c) Connect
the equipment to an outlet on a circuit different from that to which the receiver is
connected. (d) Consult the supplier or an experienced radio/TV technician for help.
OPERATION
European EMC directive 2004/108/EC
FURTHER
INFORMATION
A Category 5 (or better) twisted pair cable must be used to connect the units in order
to maintain compliance with radio frequency energy emission regulations and ensure a
suitably high level of immunity to electromagnetic disturbances.
All other interface cables used with this equipment must be shielded in order to maintain
compliance with radio frequency energy emission regulations and ensure a suitably high
level of immunity to electromagnetic disturbances.
INSTALLATION
RADIO FREQUENCY ENERGY
This equipment does not exceed the class A limits for radio noise emissions from digital
apparatus set out in the radio interference regulations of the Canadian Department of
Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la classe A prescrites dans le règlement sur le
brouillage radioélectriques publié par le ministère des Communications du Canada.
INDEX
Canadian Department of Communications RFI statement
70
INSTALLATION
www.adder.com/contact-details
Support:
forum.adder.com
CONFIGURATION
Contact:
OPERATION
www.adder.com
INDEX
FURTHER
INFORMATION
Web:
Documentation by:
www.ctxd.com
© 2014 Adder Technology Limited
All trademarks are acknowledged.
Part No. MAN-ALIF2112T • Release 3.3a
71
G
Gateway
remote setting 53
Gigabit Ethernet 14
Gui editing 39
H
Hextile 63
Host computer
configuration 56
power switching setup 57
Hotkey sequences 66
codes and macros 66
HTTP port
remote setting 53
J
Jumbo frames (packets) 44
K
Keyboard codes
sending 36
Keyboard Control 36
Keyboard layout
remote setting 50
L
Layers 2 and 3 46
Link cable lengths 14
Logging 58
Log on 23,33
N
Network configuration 53
Network layout 40
Network switch
choosing 40
Null-modem cable
pin-out 67
O
Optimization
statistics for 30
Options switches 21
OSI model 46
P
Password
remote logon 33
Power strings
for switching 57
Power switching
configuration 57
control sequences 57
on & off select 35
user permissions 48
via viewer 35
Private
access mode 35
CONFIGURATION
M
MAC address 52,53
Magic Eye 3,27
Menu bar editing 39
Menu key
changing 59,60
Mouse
advanced configuration 35
control 34
resync 34
Multicast
configuration 20
Q
Querier 44
R
Rack mounting 8
Raw 63
Receiver
configuration 19
Refresh screen 34
Remote configuration
advanced unit configuration 51
host configuration 56
logging and status 58
network configuration 53
setting IP access control 54
unit configuration 50
user accounts 48
Reset
manual 16
Resync mouse 34
OPERATION
C
Cable
null-modem 67
Cable specifications 66
CODEC 3
Configuration
advanced mouse 35
browser-based utility 17
menu bar edit 39
receiver 19
styles 2
switches 21
transmitter 18
Connections
TX audio links 12
TX USB link 12
Controls
viewer options 34
Control strings
power switching 57
Cut-through 46
F
Factory reset 16
Fast-Leave 44
Fibre Channel 14
Firmware
current version 50
upgrade 21
Forwarding modes 46
Fragment-free 46
Frame Skipping 27
Front panel indicators 22
Full screen mode
escape from (F8) 23
I
IANA 20
IGMP 44
fast-leave 44
querier 44
snooping 44
Indicators 5,22
Initial configuration 16,32
IP access control 53,54
IP address
remote setting 53
IP gateway 53
IP network mask 53
FURTHER
INFORMATION
B
Browser
viewer options 32,63
Browser-based utility 17
D
Dimensions 67
Dithering 3
INDEX
A
Access control
configuration 54
Access mode
shared & private 35
Active Copper 14
Adaptive 46
Advanced unit configuration 51
AFZ 3,27
Anti-dither support 3
Auto select 63
INSTALLATION
Index
72
INSTALLATION
CONFIGURATION
W
Warranty 69
Web browser
viewer options 32,63
Weight 67
Z
ZRLE 63
OPERATION
U
Unit Configuration 50
Unit name
remote setting 50
Upgrade
firmware 21
User accounts 48
User configuration 48,49
Username
remote logon 33
V
Video
optimization 18
Video modes 67
Video settings 35,36
Viewer window 23
menu bar editing 39
VNC port
remote setting 53
VNC viewer
connection options 59
window options 62
FURTHER
INFORMATION
T
Teaming port 14
TX settings 26
Threshold setting 36
Time & date configuration 52
TLS 3
Transmitter
configuration 18
Transport Layer Security 3
Troubleshooting 42
INDEX
S
Safety information 69
Screen
best resolution 23
navigation 23
refresh 34
Server
configuration 56
SFP module 14
Shared
access mode 35
Single mouse mode 34
Slow connections
optimizing for 23
Snooping 44
Spanning Tree Protocol 45
Specifications 67
Statistics
graphing 30
Store and forward 46
Switch
choosing 40
configuring 41
Syslog 58
System port 14
TX settings 26
73